Modulated Metasurface Pdf

We employ the metasurface for both mode modulation and mode. Room-Temperature Active Modulation of Valley Dynamics in a Monolayer Semiconductor through Chiral Purcell Effects. modulated metasurface that functions as a serrodyne frequency translator, is reported at X-band frequencies. For individual metasurface at 0. 4 GHz leading to dramatic phase modulation within that frequency interval. The feature is obtained by utilizing both periodicity of the super unit structure and phase modulation provided in the unit cells. Huygens' metasurfaces for selected antenna applications 9 OPTICAL METASURFACES 11 4. Magneto-optic transmittance modulation observed in a hybrid graphene - split ring resonator terahertz metasurface Simone Zanotto1, Christoph Lange2, Thomas Maag2, Alessandro Pitanti1, Vaidotas Miseikis3, Camilla Coletti3, Riccardo Degl'Innocenti4, Lorenzo Baldacci5, Rupert Huber2, and Alessandro Tredicucci6. The phase introduced by the metasurface is superimposed by the vortex phase and focusing phase. Here, by combining acoustic metasurface and adaptive wavefield shaping, we demonstrate the versatile control of reverberating sound fields in a room. Figure 2b shows the measured transmission spectra for the circularly crosspolarized wave T RL as a function of the gate voltage V g (from 0. The data show a near-perfect partitioning of Re/Os and (187)Os/(188)Os ratios between peridotites (low) and eclogites (high). A surface wave (SW) excited on the metasurface can be controlled in terms of both path and dispersion properties by means of its interaction with the surface impedance. metasurface boosts the surface plasmon-polaritons (SPPs) of the graphene metasurface which leads to confined field enhancement, (2) the merging and interaction of the resonances of the metal and graphene metasurfaces, and (3) the multiple reflections and superpositions between the metasurfaces and the gold layer. (a) Geometry of the acoustic gradient metasurface(AGM) slab with continuous parameter distribution, here d is the thickness of the metasurface slab and L is the length of the modulation period. Video directly gets played in the window. This multiplexing metasurface device provides the opportunity for both spatial and time modulation. Metasurface technology is a promising solution for AIM High- Gain Antenna (HGA), that ensures the Deep-Space communication link to Hearth. Metasurface is a two-dimensional array of subwavelength scatterers. We design an acoustic metasurface with a semi-closed and nested slotted tube array, and it possesses the capacity of modulating the reflected phase with sub-wavelength thickness (about λ/23). Like the voice or Audio signal, usually uses AM modulation technology before, but it still has some shortcoming. Synthesis of modulated-metasurface antennas with amplitude, phase, and polarization control G Minatti, F Caminita, E Martini, M Sabbadini, S Maci IEEE Transactions on antennas and propagation 64 (9), 3907-3919 , 2016. By combining nano-indium oxide layer with metal periodic metamaterial structure, the modulation was optimized to 35%. We consider a metasurface lens with the focal length of fwhich is designed for operation at the wavelength , and is placed at the distance ffrom an image sensor. Kildishev1 & Vladimir M. A high-doped (n++) InAs layer is epitaxially grown on top of a GaAs substrate and is used as a metallic mirror with a negative real dielectric constant at the operating wavelength. These antennas operate on an interaction between a cylindrical surface-wave (SW) excited by an isotropic TM radiator, and an MTS having a spatially. Sherrott, Michelle C. edu 1200 E California Blvd. This setup presents a. We first investigate electrical modulation of circular polarization conversion in a graphene metasurface with homogeneous unit cells (Figure 2a). This mutation can be realized by a two-dimensional array of subwavelength scattering, which is an electromagnetic modulation primitive structure at the light wavelength called an optical antenna. DYNAMIC METASURFACE FOR BROADBAND ELECTROMAGNETIC MODULATOR IN REFLECTION Pin Chieh Wu1, Hong Cai2, Yuan Dong Gu2, Wei Ming Zhu1, Wu Zhang1, Zhen Chuan Yang3, Ye Feng Jin3, Yu Long Hao3, Dim-Lee Kwong2, Din Ping Tsai4,5, and Ai-Qun Liu1†. (PSK) modulation, of the (GHz) stepped-FM tones. The fabricated metasurface shows up to 30% relative change in reflectance in the visible spectral range upon application of 5 mV and 78% absolute change in reflectance upon application of 100 mV of bias. NASA Astrophysics Data System (ADS) Park, Jaeyoung; Krall, Nicholas A. 6 THz, and the modulation depth reached up to 14%. Metasurface technology is a promising solution for AIM High- Gain Antenna (HGA), that ensures the Deep-Space communication link to Hearth. The general effects of metasurface modulation are similar to those obtained by TO in volumetric inhomogeneous metamaterials, namely readdressing the propagation path of an incident. Compared to a general vortex wave metasurface, the simulation results show that the divergence of the re ected vortex wave generated by our designed metasurface is. Utilizing graphene as an active load with. The proposed acoustic metasurface can dynamically achieve a full span of 360° phase modulation by three simple solutions. Experimental Demonstration of Phase Modulation and Motion Sensing Using Graphene-Integrated Metasurfaces Nima Dabidian,† Shourya Dutta-Gupta,† Iskandar Kholmanov,‡,# Kueifu Lai,† Feng Lu,§ Jongwon Lee,§. Its application ranges from tele-communication,. Additionally, the reconfigurable metasurface antenna can function as a. Metasurface has been proposed as one critical platform for orbital angular momentum (OAM) multiplexing. that impinges onto a time-modulated metasurface. Cummer1 Metasurfaces are a family of novel wavefront-shaping devices with planar profile and sub-wavelength thickness. The general effects of metasurface-modulation are similar to those obtained by transformation optics (TO) in volumetric inhomogeneous metamaterials, namely re-addressing the propagation path of an incident wave. Publisher's PDF, also known as Version of record Helicity multiplexed broadband metasurface holograms amplitude modulation, which deteriorates the image. While a prior work has shown an electrically tunable phase of electromagnetic waves transmitted through the VO 2-based metasurface, the operation. By definition, the reflection coefficient is the ratio of the complex amplitude of the reflected wave to that of the incident wave [24]. 4GHz (see Supplementary Information for more details). Date: 19 August 2019. FULL TEXT Abstract: Wireless powering could enable the long-term operation of advanced bioelectronic devices within the human body. individual control of metasurface elements. modulation depth is far higher than those of previously re-ported plasmonic switch systems [47–55]. Venkatesan1,3,4,5, Cheng-WeiQiu1 & MinghuiHong 1 Metamaterials open up various exotic means to control electromagnetic waves and among them. metasurface unit-cell (referred to as a meta-atom). convertor (DUC), which up-shis the digitally modulated signal to digital intermediate frequency. Several examples of a metasurface with static or space-time modulation are shown for normally incident plane and Gaussian beams, showing the scattered field solutions. The design of the reconfigurable metasurface (upper layer) and the beamformer (lower layer) will be carried out by developing ad-hoc numerical methods and/or using commercial softwares. (b) The self-focusing effect of the surface plasmons in the longitudinally modulated metasurface in the case when a single silver ridge is excited normally at k x = 0. Satellite Frequencies, valid from 1st July 2019 Digital Satellite 1 Astra 2E (28. MINATTI et al. Title: Microsoft Word - EuCAP2014_NIWS5_ModulatedMetasurfaceAnt. Abstract – We propose an active metasurface based on graphene magnetic resonator in reflection mode. This modulation depth is far superior to 5 dB achievable from a plain silicon-on-sapphire substrate with effectively 25 times higher pumping energy. Metasurface holograms for visible light Xingjie Ni1, Alexander V. The reflection. Video directly gets played in the window. Switchable Ultrathin Quarter-wave Plate in Terahertz Using Active Phase-change Metasurface Dacheng Wang1,2, LingchaoZhang3,4, Yinghong Gu1, M. Light from arm R2 is blocked, and light from arm R1 is modulated by the SLMin orderto realize beam steering. Since the coding metasurface is composed of '0' and '1' digital units with opposite phase responses, the digital information can be directly modulated to the metasurface with certain coding sequences and sent to space under the illumination of feeding antenna. Lin, and Y. This antenna is based on the interaction of two cylindrical-wavefront surface wave (SW). 75 was ∼10%, with a measured focal spot. CROSS REFERENCE TO RELATED APPLICATIONS. Metasurface is a two-dimensional array of subwavelength scatterers. modulation of metasurfaces exhibits a good candidate to achieve the spatial light modulators (SLM) and have been explored to realize the polarization-controlled dual images at arbitrary electromagnetic wave region in referred to as broadband metasurface hologram or metahologram [11-16]. 4) we simultaneously measure the resistance of the device in a two terminal geometry by applying a small bias. 9 Architectural decomposition of a leaky-wave antenna based on modulated metasurface The following basic elements compose this kind of antenna: A dielectric slabable to support a primary surface wave and an implementation of a modulated metasurface; An exciter(to generate the surface wave and, in some cases, also to provide a useful radiated. 75 was ∼10%, with a measured focal spot. While numerous efficient approaches have been applied in metasurfaces to realize spin-selective manipulation of optical waves, the implementation of giant spin-selective asymmetric transmission remains a challenge. (b) The self-focusing effect of the surface plasmons in the longitudinally modulated metasurface in the case when a single silver ridge is excited normally at k x = 0. Later, single-beam computer-generated phase holography was proposed for restoring the wavefront. By comparing Figure 2 c with Figure 2 f, it clearly shows that the functionality of the merged metasurface is switchable, depending on the incident/detected combination. - The transmission efficiency remains above 90% for varying pillar diameter over the design range. Cummer1 Metasurfaces are a family of novel wavefront-shaping devices with planar profile and sub-wavelength thickness. 5 GHz), so that the y-polarization reflection phase of the metasurface do not vary too much at frequencies around 9. Reconfigurable Phase-Change Metasurface Absorbers for Optoelectronics Device Applications. They are provided for your convenience, yet you may download them only if you are entitled to do so by your arrangements with various publishers. (b) The discretized model of the acoustic gradient metasurface utilized for real practice. can be used as carriers (12 3) 12 3, , , , ( carrier), , , ( modulation parameters. Configuration of an electrically tunable III-V-based metasurface for dynamic thermal emission control. The proposed all-dielectric metasurface is composed of periodically arranged pairs of asymmetric silicon nanobars, which can. DYNAMIC METASURFACE FOR BROADBAND ELECTROMAGNETIC MODULATOR IN REFLECTION Pin Chieh Wu1, Hong Cai2, Yuan Dong Gu2, Wei Ming Zhu1, Wu Zhang1, Zhen Chuan Yang3, Ye Feng Jin3, Yu Long Hao3, Dim-Lee Kwong2, Din Ping Tsai4,5, and Ai-Qun Liu1†. For individual metasurface at 0. This paper has potential applications in rigid underwater acoustic metasurface designs with low frequency, adjustable direction and sound energy attenuation. Figure 2b shows the measured transmission spectra for the circularly crosspolarized wave T RL as a function of the gate voltage V g (from 0. The basic principle involves combining the metasurface with doped silicon, phase change materials, ferroelectric thin films, superconducting materials, modulation doped heterojunctions, graphene and so on. Here we show that a widely tunable metasurface composed of optical antennas on graphene can be incorporated into a subwavelength-thick optical cavity to create an electrically tunable perfect absorber. Caloz, "Simultaneous control of the spatial and temporal spectra of light with space-time varying metasur-. metasurface to reshape a single nanoscale metasurface element, or unit cell, at a time. In particular, I will present how guided waves in ensembles of Mach -Zehnder. introduces unwanted phase and amplitude modulation, which in turn degrades the performance of the metasurface. Paulson School of Engineering and Applied Sciences, together with collaborators from the Fu Foundation School of Engineering and Applied Science at Columbia University, have developed a system to convert one wavelength of light into another without the need to phase match. Assistant Professor in K. While the coded modulation inherently introduces some bandwidth to the illuminating TX signal, practical modulation rates (kHz to MHz) are e. Patients were randomly assigned (1:1:1) to conventional (74 Gy delivered in 37 fractions over 7·4 weeks) or one of two hypofractionated schedules (60 Gy in 20 fractions over 4 weeks or 57 Gy in 19 fractions over 3·8 weeks) all delivered with intensity-modulated techniques. By definition, the reflection coefficient is the ratio of the complex amplitude of the reflected wave to that of the incident wave [24]. Later, single-beam computer-generated phase holography was proposed for restoring the wavefront. Toosi University of Technology. To interpret the phase modulation of the silicon nanobar more clearly, a gradient metasurface supporting anomalous re-flection light is demonstrated. Cummera) Department of Electrical and Computer Engineering, Duke University, Durham, North Carolina 27708, USA. Designing reconfigurable metasurfaces that can dynamically control scattered electromagnetic waves and work in the near-infrared (NIR) and optical regimes remains a challenging task, which is hindered by the static material property and fixed structures. To be specific, the plasmonic dispersion relation of a transverse magnetic graphene plasmon is electronically tunable by adjusting carrier density in graphene with external gate bias, and graphene plasmonic nano cavities have been utilized to modulate mid-infrared light. Compared to a general vortex wave metasurface, the simulation results show that the divergence of the re ected vortex wave generated by our designed metasurface is. 29 To date, however, major research efforts have been restricted on the single dimensional modulation including transverse or longitudinal spin-dependent splitting. efficient terahertz (THz) modulation by coupling graphene strongly with a broad-band THz metasurface device. (b) A schematic of a three-wavelength metasurface triplet lens designed using the same principle. •The optimum surface. The metasurface hologram sample is fabricated on a silicon substrate by conventional photolithography. 9 Architectural decomposition of a leaky-wave antenna based on modulated metasurface The following basic elements compose this kind of antenna: A dielectric slabable to support a primary surface wave and an implementation of a modulated metasurface; An exciter(to generate the surface wave and, in some cases, also to provide a useful radiated. Click bar to sort by field. Bachelor of Science Electrical Engineering Florida Institute of Technology 2012 A thesis submitted to the College of Engineering at Florida Institute of Technology in partial fulfillment of the requirements for the degree of Master of Science in. Subwavelength diffractive acoustics and wavefront manipulation with a reflective acoustic metasurface Wenqi Wang, Yangbo Xie, Bogdan-Ioan Popa, and Steven A. Synthesis of modulated-metasurface antennas with amplitude, phase, and polarization control G Minatti, F Caminita, E Martini, M Sabbadini, S Maci IEEE Transactions on antennas and propagation 64 (9), 3907-3919 , 2016. and Atwater, Harry A. modulation, including anomalous reflection and refraction, planar acoustic axicon and lens [25, 26]. Matt Escarra for working with me and helping me learn how to discover. A review of thin absorbers for electromagnetic waves is shown in Ref. Metasurface is chosen to work as the visor, because of its flat surface and capability to implement spatial modulation to incident light wave. (PSK) modulation, of the (GHz) stepped-FM tones. Stephen Graves is the Abraham J. Later, single-beam computer-generated phase holography was proposed for restoring the wavefront. Chamanara, Y. metasurface design will be presented to achieve tunable and modulated transmis-sion at near-infrared (near-IR) frequencies (C. Provisional Patent Application Ser. This THz metasurface, made of periodic gold slit arrays, shows near unity broadband transmission that arises from coherent radia-tion of the enhanced local-field in the slits. The phase introduced by the metasurface is superimposed by the vortex phase and focusing phase. The metasurface lens focuses light with the wavelength of + to the distance of f ffrom the metasurface lens. (a) The simulated holographic images created by an ideal metasurface hologram with smooth phase and amplitude modulations. By changing the configuration of the nanorods, the phase and amplitude can be simultaneously modulated. metasurface design will be presented to achieve tunable and modulated transmis-sion at near-infrared (near-IR) frequencies (C. and Garcia, Juan C. Kats, "Nanosecond mid-infrared pulse generation via modulated thermal " Optical Metasurface Based on the. wave through the metasurface unit-cell at 100 GHz. When a beam goes through a metasurface with the gradient phase Φ, the direction of refracted. metasurface is a material with a thickness less than the wavelength of the incident beam. Spin-selective manipulation of optical waves is widely utilized in various optical techniques and plays a key role in modern nanophotonics. This implies that the metasurface can, in. Modulation Process ¾Modulation implies varying one or more characteristics (modulation parameters a 1, a 2, … a n) of a carrier f in accordance with the information-bearing (modulating) baseband signal. Figure 2c inset shows the color map transmission profile of a 100 GHz electromagnetic. Radiation by Metasurface The antenna we present here is founded on an inhomogeneous anisotropic metasurface, namely a planar surface characterized by non uniform impedance boundary conditions. With simultaneous five-level amplitude modulation and eight-level phase modulation, we address this sample as “MAPM” (metasurface with simultaneous amplitude and phase modulation), whose optical image is shown in Fig. These antennas operate on an interaction between a cylindrical surface-wave (SW) excited by an isotropic TM radiator, and an MTS having a spatially. Metasurface absorbers are broadly studied for their low profile and simplicity of fabrication. We report here the phase modulation of an electronically reconfigurable metasurface and demonstrate its utility for mid-infrared beam steering. Subwavelength diffractive acoustics and wavefront manipulation with a reflective acoustic metasurface Wenqi Wang, Yangbo Xie, Bogdan-Ioan Popa, and Steven A. Experimental Demonstration of Phase Modulation and Motion Sensing Using Graphene-Integrated Metasurfaces Nima Dabidian,† Shourya Dutta-Gupta,† Iskandar Kholmanov,‡,# Kueifu Lai,† Feng Lu,§ Jongwon Lee,§. Koulouklidis 1 ,. Metasurface holograms for visible light Xingjie Ni1, Alexander V. metasurface is a material with a thickness less than the wavelength of the incident beam. In contrary, the latter part in Eq. 9 Architectural decomposition of a leaky-wave antenna based on modulated metasurface The following basic elements compose this kind of antenna: A dielectric slabable to support a primary surface wave and an implementation of a modulated metasurface; An exciter(to generate the surface wave and, in some cases, also to provide a useful radiated. MINATTI et al. oxides [4, 5] into a metasurface for developing an electrically controllable metasurface operating in the near-IR region. Broadband phase modulation has been demonstrated using inhomogeneous metasurfaces with different geome-. Here, by combining acoustic metasurface and adaptive wavefield shaping, we demonstrate the versatile control of reverberating sound fields in a room. The programmable reflection coefficient of the metasurface, which essentially performs modulation, is expressed as Γ(t). 22−27 These developments enable the possibility for the applications of PSHE, such as precision metrology28 and spin-based photonic devices. 18,19 Active metasurface devices have a large design. edu 1200 E California Blvd. Zheludev,1,2, and Eric Plum1, y 1Optoelectronics Research Centre and Centre for Photonic Metamaterials, University of Southampton, High eld, Southampton, SO17 1BJ, UK. Assume a plane wave 𝑈= − ( + + ) is incident upon a phase mask in the = r plane characterized by a transfer function 𝐻= 𝛷( , ), as in Figure 1. We also outlook the remaining challenges and potential developments of nonlinear photonic metasurface in the near future. Double-sideband large-carrier modulation 2011/2/21 MW & RF Design / Prof. e modulated the metasurface in a programmable way via FPGA, and. Reconfigurable Metasurface for Multifunctional Control of Electromagnetic Waves Cheng Huang, Changlei Zhang, Jianing Yang, Bo Sun, Bo Zhao, and Xiangang Luo* DOI: 10. • Reconfigurable metasurface antenna and circuit designs • Broadband/multiband metasurface antennas and circuits • Modulated metasurface Antennas • Multifunctional metasurface antennas and circuits • Signal and wave manipulations using metasurface • Metasurface device and antenna for 5G and wireless systems. edu 1200 E California Blvd. (b) The self-focusing effect of the surface plasmons in the longitudinally modulated metasurface in the case when a single silver ridge is excited normally at k x = 0. introducing a modulation of the equivalent surface impedance it is possible to engineer the interaction of a given incoming field with the metasurface, thus realizing a large class of devices [3]. regime and we show that THz modulation can be greatly enhanced by properly designing the slit arrays. Nonlinear Metasurface Based on Giant Optical Kerr Response of Gold Quantum Wells Yuzhe Xiao,† Haoliang Qian,† and Zhaowei Liu*,†,‡,§ †Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California. Refractory plasmonic metasurfaces 13 RECONFIGURABLE AND ACTIVE METASURFACES 16 6. Experimental Demonstration of Phase Modulation and Motion Sensing Using Graphene-Integrated Metasurfaces Nima Dabidian,† Shourya Dutta-Gupta,† Iskandar Kholmanov,‡,# Kueifu Lai,† Feng Lu,§ Jongwon Lee,§. and Fountaine, Katherine T. 29, 2016, by Goutam Chattopadhyay and David Gonzalez-Overjero, entitled "LOW-PROFILE AND HIGH-GAIN MODULATED METASURFACE ANTENNAS FROM GIGAHERTZ TO TERAHERTZ RANGE FREQUENCIES. Chen, Numerical study of a high-resolution far-field scanning optical microscope via a surface plasmon-modulated light source, Journal of Lightwave Technology 25, 830 (2007). and Hon, Philip W. Tunable all-dielectric metasurface for phase modulation of the reflected and transmitted light via permittivity tuning of indium tin oxide. The metasurface satisfies the boundary condition between region 1 and 2 by constructing equivalent electric and magnetic surface currents. metasurface hologram with high efficiency and good image fidelity over a broad range of frequencies. 6 at 0V to 3. Magneto-optic transmittance modulation observed in a hybrid graphene-split ring resonator terahertz metasurface Simone Zanotto, Christoph Lange, Thomas Maag, Alessandro Pitanti, Vaidotas Miseikis, Camilla Coletti, Riccardo Degl'Innocenti, Lorenzo Baldacci, Rupert Huber, and Alessandro Tredicucci. Metasurface-based optical cavity structures consist of a metallic metasurface realized on top of a dielectric slab backed with a metal plane. This "Cited by" count includes citations to the following articles in Scholar. of a metasurface lens. In contrary, the latter part in Eq. We employ the metasurface for both mode modulation and mode. Figure 2b shows the measured transmission spectra for the circularly crosspolarized wave T RL as a function of the gate voltage V g (from 0. The experimental results are of great significance for the research and development of terahertz tunable metasurface. A phased array antenna with a broadly steerable beam based on a low-loss metasurface lens Yahong Liu, Xueyu Jin, Xin Zhou et al. Publications of Mikhail Kats and M. Pendry Imperial College London, Department of Physics, The Blackett Laboratory, London SW7 2AZ, UK. The reflected phase shifts can be obtained from 0 to 2π by different rotation angles of internal slotted tubes. refl ectivity modulation of the metasurface is shown with a response time less than ∼10 ns using bias voltage modulation between +2 V and +4 V. Tunable all-dielectric metasurface for phase modulation of the reflected and transmitted light via permittivity tuning of indium tin oxide. Dynamic Control over the Optical Transmission of Nanoscale Dielectric Metasurface by Alkali Vapors Jonathan Bar-David, Liron Stern, and Uriel Levy* Department of Applied Physics, The Benin School of Engineering and Computer Science, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel. NASA Astrophysics Data System (ADS) Park, Jaeyoung; Krall, Nicholas A. Metasurface-based optical cavity structures consist of a metallic metasurface realized on top of a dielectric slab backed with a metal plane. The broadband response of the metasurface covers S, C, and L bands of fibre communications. can be used as carriers (12 3) 12 3, , , , ( carrier), , , ( modulation parameters. As a new paradigm, holographic laser postprocessing at the unit cell level is hereby introduced and used to inscribe local metasurface functionalities, that is, beyond the control of color for, for example, high-density. Figure 2c inset shows the color map transmission profile of a 100 GHz electromagnetic. 23787-23797, 2015). Analysis of the scattering from a novel type of metasurface consisting of unit cells incorporating a width modulated coplanar waveguide (CPW) line is presented. Unlike conventional phase plates, the metasurface allows for both phase and polarization conversion, providing full flexibility for mode engineering. Experimental Demonstration of Phase Modulation and Motion Sensing Using Graphene-Integrated Metasurfaces Nima Dabidian,† Shourya Dutta-Gupta,† Iskandar Kholmanov,‡,# Kueifu Lai,† Feng Lu,§ Jongwon Lee,§. Meta-form visor’s vision performance is simulated in Zemax. This THz metasurface, made of periodic gold slit arrays, shows near unity broadband transmission, which arises from coherent radiation of the enhanced local-field in the slits. that impinges onto a time-modulated metasurface. An in-plane feeder excites a surface wave on the metasurface that transforms it into a leaky wave The final result is a satisfactory proof of concept device representing an innovative solution for satellite applications. Provisional Patent Application Ser. 2 at 0V to 7. Venkatesan1,3,4,5, Cheng-WeiQiu1 & MinghuiHong 1 Metamaterials open up various exotic means to control electromagnetic waves and among them. @article{Lee2017CompleteAA, title={Complete amplitude and phase control of light using broadband holographic metasurfaces. Unlike conventional phase plates, the metasurface allows for both phase and polarization conversion, providing full flexibility for mode engineering. A metasurface is a thin layer periodically loaded in order to achieve uncommon dispersion properties of guided waves. 18,19 Active metasurface devices have a large design. A review of thin absorbers for electromagnetic waves is shown in Ref. wave through the metasurface unit-cell at 100 GHz. metasurface to reshape a single nanoscale metasurface element, or unit cell, at a time. Download PDF. Small driving voltages from 3~5 V are sufficient to tune the metasurface resonances, with an associated transmission modulation of more than 65%. Schulz, Jeremy Upham, Ebrahim Karimi, and Robert W. We consider a metasurface lens with the focal length of fwhich is designed for operation at the wavelength , and is placed at the distance ffrom an image sensor. Metasurface antennas belong to the class of leaky wave antennas. Image simulation using the designed metasurface is performed in Lumerical. Metasurfaces offer significant potential to control far-field light propagation through the engineering of the amplitude, polarization, and phase at an interface. PHASE MODULATION VIA THE METASURFACE. An additional application for this multimode tunable device is biosensing due to the enhanced Q factor and multiple operating modes with narrow linewidths. Numerical and experimental examples indicate that the designed metasurface can be used for tunable wave front redirection, focusing with varying wavelengths and sound source illusion. Full-Color Plasmonic Metasurface Holograms Weiwei Wan, Jie Gao,* and Xiaodong Yang* Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States * S Supporting Information ABSTRACT: Holography is one of the most attractive approaches for reconstructing. This application claims the benefit under 35 U. As a new paradigm, holographic laser postprocessing at the unit cell level is hereby introduced and used to inscribe local metasurface functionalities, that is, beyond the control of color for, for example, high-density. Analysis of the scattering from a novel type of metasurface consisting of unit cells incorporating a width modulated coplanar waveguide (CPW) line is presented. (b) The self-focusing effect of the surface plasmons in the longitudinally modulated metasurface in the case when a single silver ridge is excited normally at k x = 0. resonant elements in metasurface with a circularly-polarized incidence39. Schulz, Jeremy Upham, Ebrahim Karimi, and Robert W. Assistant Professor in K. The phase introduced by the metasurface is superimposed by the vortex phase and focusing phase. To be specific, the plasmonic dispersion relation of a transverse magnetic graphene plasmon is electronically tunable by adjusting carrier density in graphene with external gate bias, and graphene plasmonic nano cavities have been utilized to modulate mid-infrared light. shaped meta-atoms can be applied to implement a reflective metasurface. This "Cited by" count includes citations to the following articles in Scholar. ALUMINUM NITRIDE PIEZOELECTRIC MICROELECTROMECHANICAL RESONANT PHYSICAL SENSORS A Dissertation Presented By Yu Hui to The Department of Electrical and Computer Engineering in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the field of Electrical Engineering Northeastern University Boston, Massachusetts. Matthew Escarra2 1University of Arkansas, 2Tulane University Abstract Acknowledgements A big thanks to my graduate mentor Adam Ollanik and my supervisor and mentor Dr. An optically pumped terahertz (THz) modulator based on a MoS 2-Si heterostructure metasurface are fabricated and investigated in this paper. We consider a metasurface lens with the focal length of fwhich is designed for operation at the wavelength , and is placed at the distance ffrom an image sensor. The full, continuous, and broadband control of both amplitude and phase was achieved using X-shaped meta-atoms based on the expanded concept of the. This antenna is based on the interaction of two cylindrical-wavefront surface wave (SW). We present the work in [1]. The broadband response of the metasurface covers S, C, and L bands of fibre communications. 2, Δφ(R, λ), is a function of. Whereas, for the metasurface cavity case, the total input conductance varies from 4. Figure 2b shows the measured transmission spectra for the circularly crosspolarized wave T RL as a function of the gate voltage V g (from 0. Note that the femtosecond polarization switch is firstly numerically demonstrated based on the plasmonic metasurface via the hybridization of in-plane coupling and out-of-plane coup-ling. This metasurface is capable of performing wide phase modulation over both reflection and transmission modes at operating wavelengths of λ 1 and λ 2. refl ectivity modulation of the metasurface is shown with a response time less than ∼10 ns using bias voltage modulation between +2 V and +4 V. The full, continuous, and broadband control of both amplitude and phase was achieved using X-shaped meta-atoms based on the expanded concept of the. Finally, the recent progress in optical switching and modulation is summarized. Later, single-beam computer-generated phase holography was proposed for restoring the wavefront. Optical spin-to-orbital angular momentum conversion in ultra-thin metasurfaces with arbitrary topological charges Frédéric Bouchard, Israel De Leon, Sebastian A. Figure 2c inset shows the color map transmission profile of a 100 GHz electromagnetic. 4, Issue 6,. 19 These works, however, report only the intensity modulation of the scattered light and do not demonstrate phase modulation at optical frequencies. Amir Arbabi, Ehsan Arbabi, Yu Horie, Seyedeh Mahsa Kamali, Andrei Faraon*, Planar metasurface retrore ector, Nature Photonics, 11, 415420 (2017) Ehsan Arbabi, Amir Arbabi, Seyedeh Mahsa Kamali, Yu Horie, Andrei Faraon*, Controlling the sign of chromatic dispersion in di ractive optics with dielectric metasurfaces, Optica, Vol. For individual metasurface at 0. , locally suppress the sound intensity by destructive inter ference, is achieved by inverting only two arrows labeled 1, 3. While metasurfaces have unique advantages to achieve light modulation with an ultrathin 2D. With a simple bi-asing architecture, the metasurface provides electrically-tunable transmission phase that covers 360. While a prior work has shown an electrically tunable phase of electromagnetic waves transmitted through the VO 2-based metasurface, the operation. The feature is obtained by utilizing both periodicity of the super unit structure and phase modulation provided in the unit cells. Realization and Measurement of Broadside Beam Modulated Metasurface Antennas By Marco Faenzi, Francesco Caminita, Enrica Martini, Paolo De Vita, Gabriele Minatti, Marco Sabbadini and Stefano Maci No static citation data No static citation data Cite. Shalaev1 Holography, a revolutionary 3D imaging technique, has been developed for storing and recovering the amplitude and phase of light scattered by objects. To quantify the speed, we modulated the height of our metasurfaces with a sinusoidal bias and measured the ratio of the scattered power between the maximum and minimum deflection peaks. With this metasurface, the resonant frequency and negative permittivity can be controlled and the size can be reduced. Metasurface technology is a promising solution for AIM High- Gain Antenna (HGA), that ensures the Deep-Space communication link to Hearth. The metasurface proposed here consists of periodic arrangement of chromium dipolar antennas with the same geometry but spatially varying orientations, which. This is achieved through the design and the realization of a binary phase-modulating spatial sound modulator that is based on an actively reconfigurable acoustic metasurface. Unlike conventional phase plates, the metasurface allows for both phase and polarization conversion, providing full flexibility for mode engineering. Here, a retroreflective metasurface using subwavelength-thick reconfigurable C-shaped resonators (RCRs) is reported, which reduces the overall thickness from the previous record of 590 λ 0 down to only 0. The proposed concept of ultra-broadband metasurface modulator can be readily extended to electrically controlled terahertz wave modulation. Image simulation using the designed metasurface is performed in Lumerical. Date: 19 August 2019. While the phase modulated metasurface applied as a superstrate in a Fabry-Perot cavity antenna, shows the capability to steer the radiated beam to an off-normal radiation, the high quality factor resonant metasurface presents high. •Connection between modulated microstrip line geometric parameters and surface impedance value. (b) The simulated holographic images created by a metasurface hologram with an eight-level phase modulation and a four-level amplitude modulation. The THz wave modulation in MoS 2 metasurface has been demonstrated by THz time domain spectroscopy experiment and numerical simulation, which can reach over 90% under the continuous wave laser pumping of 4W/cm 2 power density. Argyropoulos, Optics Express, vol. @article{Lee2017CompleteAA, title={Complete amplitude and phase control of light using broadband holographic metasurfaces. Modulation index, β, is used to describe the ratio of maximum frequency deviation of the carrier to the maximum frequency deviation of the modulating signal. •Connection between modulated microstrip line geometric parameters and surface impedance value. By dynamically creating metasurface structures through illuminating a thin silicon wafer with femtosecond laser, which is spatially modulated, an array of reconfigurable subwavelength resonators is generated. The metasurface proposed here consists of periodic arrangement of chromium dipolar antennas with the same geometry but spatially varying orientations, which. A sub-5 nm conformal protein layer covering the pixelated metasurface causes a pronounced modulation of the individual metapixel reflectance spectra due to the coupling between the molecular vibrations and the enhanced electric near-fields around the dielectric resonators. wave through the metasurface unit-cell at 100 GHz. This "Cited by" count includes citations to the following articles in Scholar. Vahabzadeh, and C. A narrow-band wavelength de-multiplexing metasurface hologram is proposed. The general effects of metasurface modulation are similar to those obtained by TO in volumetric inhomogeneous metamaterials, namely readdressing the propagation path of an incident. Metasurfaces can be either structured or unstructured with subwavelength-scaled patterns in the horizontal dimensions. Whereas, for the metasurface cavity case, the total input conductance varies from 4. By employing this concept, Na et al. By combining nano-indium oxide layer with metal periodic metamaterial structure, the modulation was optimized to 35%. This application claims the benefit under 35 U. Next, the concept is being applied to high gain antennas for telemetry and tele-command of deep-space missions [13]. metasurface to reshape a single nanoscale metasurface element, or unit cell, at a time. MINATTI et al. High-Order Dielectric Metasurfaces for High-Efficiency Polarization Beam Splitters and Optical Vortex Generators Zhongyi Guo1*, Lie Zhu1, Kai Guo1, Fei Shen1 and Zhiping Yin2 Abstract In this paper, a high-order dielectric metasurface based on silicon nanobrick array is proposed and investigated. Tasolamprou 1* , Charalampros Mavidis 1,2 , Anastasios D. Meanwhile, the y-polarized magnetic resonance is at a higher frequency (16. The impedance surface is of reactive type, sinusoidally modulated as the one studied in[1], but here the boundary. Selected Journal Papers: Mohsen Salehi and Nosrat Granpayeh, “Design of an optical comb generator based on harmony search algorithm,” Journal of Nanophotonics, Vol. A narrow-band wavelength de-multiplexing metasurface hologram is proposed. Shalaev1 Holography, a revolutionary 3D imaging technique, has been developed for storing and recovering the amplitude and phase of light scattered by objects. They are provided for your convenience, yet you may download them only if you are entitled to do so by your arrangements with various publishers. The high modulation depth and fast modulation speed make the hybrid graphene metasurface an ideal platform to create SLMs for wavefront coding in mid-infrared applications, such as high frame rate. The radiation is produced by leaking energy from a surface wave propagating on a metasurface that synthesize s boundary conditions with modulated surface reactance. multipolar-modulated metasurfaces are promising for the enlargement of the color range for high-end and advanced display applications. Small driving voltages from 3~5 V are sufficient to tune the metasurface resonances, with an associated transmission modulation of more than 65%. Matt Escarra for working with me and helping me learn how to discover. building the metasurface. The modulation of the metasurface can be engineered to support carrier waves at multiple frequencies. Full-Color Plasmonic Metasurface Holograms Weiwei Wan, Jie Gao,* and Xiaodong Yang* Department of Mechanical and Aerospace Engineering, Missouri University of Science and Technology, Rolla, Missouri 65409, United States * S Supporting Information ABSTRACT: Holography is one of the most attractive approaches for reconstructing. The metasurface optical responses, including the. The metasurface hologram sample is fabricated on a silicon substrate by conventional photolithography. Metasurface technology is a promising solution for AIM High- Gain Antenna (HGA), that ensures the Deep-Space communication link to Hearth. Patients were randomly assigned (1:1:1) to conventional (74 Gy delivered in 37 fractions over 7·4 weeks) or one of two hypofractionated schedules (60 Gy in 20 fractions over 4 weeks or 57 Gy in 19 fractions over 3·8 weeks) all delivered with intensity-modulated techniques. (b) The simulated holographic images created by a metasurface hologram with an eight-level phase modulation and a four-level amplitude modulation. tiotemporally modulated metasurfaces can display changes in their frequen-cy as well as their linear momentum, angular momentum, and spin. For individual metasurface at 0. In this section, the optimized design of the reflective metasurface with X-shaped meta-atoms is introduced. KEYWORDS: Multi-dielectric metasurface, structural colors, ultrahigh saturation, deep modulation, Adobe RGB space C olors, the important carrier of visual information in the. pdf), Text File (. (PSK) modulation, of the (GHz) stepped-FM tones. Xiaobing Li, Weibing Lu, Jian Wang, and Baohu Huang School of Information Science and Engineering, Southeast University, Nanjing, China.