Graphene metasurface

Author: yemi

August undefined, 2024

WebNov 16, 2015 · We use a one-port resonator model to explain the essential features of the proposed metasurface, and we show that graphene is a gate-tunable loss material that … WebMay 5, 2024 · A graphene metasurface designed to give a 0 − 2π phase shift due to the interplay between plasmon and Fabry-Perot resonances can be employed for cloaking, …

Numerical analysis of polarization-insensitive squared spiral-shaped ...

WebFeb 20, 2024 · A KAIST research team in collaboration with the University of Wisconsin-Madison theoretically suggested a graphene-based active metasurface capable of independent amplitude and phase control of ... WebMar 29, 2024 · A broadband terahertz (THz) absorber, based on a graphene metasurface, which consists of a layer of ring-porous patterned structure array and a metallic mirror … in a spin norwich

A broadband vortex beam generator using graphene metasurface ...

WebFeb 1, 2024 · A periodic structure of our designed metasurface is composed of a wide horizontal graphene and two graphene sheets as bright mode and dark mode, … Graphene was grown on a piece of copper foil (0.025 mm thick, 99.8%, Alfa Aesar) in a home-built LPCVD system44,45. The copper foil was first loaded in a quartz tube and annealed at 1000 °C for 1 h while maintaining the H2/Ar pressure at 1 Torr under a 200 sccm flow. Graphene was then grown for 30 min by … See more Figure 1a schematically illustrates the field-effect transistor (FET) structure for tuning graphene conductivity, which consists of a 150 nm-thick Au ground plane by e-beam … See more Each pixel of the 6 × 6 pixel array was independently connected to one of the 36 channels (output voltage, −4V ∼+8 V) of a DAC evaluation board (EVAL-AD5370, Analog Devices Inc.), which was then controlled by a … See more A simplified high-frequency circuit model of the device was developed, as shown in the inset to Fig. 2a, where CE (CG) represents the … See more WebSep 29, 2024 · A Broadband solar absorber using graphene metasurface is designed to absorb the visible region. The absorber is enhancing the absorption using graphene … in a spin cherry hinton

New graphene-based metasurface capable of independent …

Terahertz absorber based on double-layer graphene metasurface …

WebThe development of patterned graphene metasurface absorbers (PGMAs) brings solution avenues to achieve light weight, thin thickness, wide absorption bandwidth, and tunable terahertz (THz) absorption properties. In order to optimize the absorption properties of PGMA, the absorption spectrum is usually used as an important evaluation metric ... WebSep 29, 2024 · The ultrathin graphene metamaterial layer has high heat conductivity and a broadband dispersion-less nature as a result (Lin et al. 2024 ). A Broadband solar absorber using graphene metasurface is designed to absorb the visible region. The absorber is enhancing the absorption using graphene metasurface (Charola et al. 2024 ). in a spiteful way crosswordWebMar 23, 2024 · Figure 1 shows the schematic of the graphene silica layered based broadband metasurface polarizer structure. Figure 1a and b show the three-dimensional view and top view of the polarizer structure. Figure 1c shows the side view and the graphene stack arrangement of the polarizer structure. The graphene sheet has been … inanimate insanity plushies

"WebJan 25, 2024 · We propose a heat-reconfigurable metasurface composed of the silicon-based gold grating. The asymmetric Fano-like line shape is formed due to the mutual … " - Graphene metasurface

Graphene metasurface

Independently tunable Fano resonance from quasibound state in …

WebMar 29, 2024 · Here, an ultra-compact double-layer graphene metasurface based absorber (GMSA) has been numerically designed using the finite integration technique (FIT) method, in which two graphene layers... WebMar 1, 2015 · By properly constructing the graphene metasurface, broadband absorption over 70% fraction bandwidth has been achieved, showing that graphene can provide a …

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WebApr 3, 2024 · In addition, graphene-based THz metasurface amplitude modulators are designed. When the depth of amplitude modulation is achieved by bias voltage modulation of the Fermi energy level of graphene, the maximum modulation amplitude is 23.42 dB, with a minimal modulation accuracy of 0.05 THz eV −1. In the article, the designed … WebApr 12, 2024 · Broadband Transmission-Coding Metasurface with Multi-Vortex-Beam. In article number 2200842, Si Jia Li and co-workers develop a new type of transmission-coding metasurface by changing the size of metal patches based on the principle of propagation phase and phase superposition, which digitally realize the vortex waves with wide-band, …

WebJan 25, 2024 · We propose a heat-reconfigurable metasurface composed of the silicon-based gold grating. The asymmetric Fano-like line shape is formed due to the mutual coupling of the local surface plasmon (LSP) in the gap between the two layers of Au gratings and the surface propagating plasmon (SPP) on the surface of the Au gratings. Then, we … WebApr 13, 2024 · A graphene metasurface placed over a glass substrate is presented. The proposed graphene metasurface can also be applied for the detection of Sodium Cyanide (NaCN), Potassium Cyanide (KCN), and Hydrogen Cyanide (HCN). The detection capacity of all three graphene metasurface sensor (GMSS) structures has been investigated and …

WebJan 7, 2024 · The resulting electron-optics-based components are large in size and operate at low temperatures to avoid violating the ballistic transport limits. In this paper, Dirac … WebApr 13, 2024 · A graphene metasurface placed over a glass substrate is presented. The proposed graphene metasurface can also be applied for the detection of Sodium …

WebJan 25, 2024 · Graphene is a promising platform for configurable terahertz (THz) devices due to its reconfigurability, but most researches focus on its electrical tunability. Here, we …

WebMay 23, 2024 · The strong Smith–Purcell radiation on the graphene metasurface is due to the interaction between the electron bunch and periodic surface plasmon polaritons … inanimate insanity posterWebApr 9, 2024 · The schematic of squared spiral-shaped graphene (SSSG) metasurface is presented in Fig. 1. The metasurface device is designed and analyzed for two different configurations such as SSSG-N and SSSG-C as showing in Fig. 1 a and b, respectively. Figure 1 c shows the top view of the structure. in a spiffyWebJul 1, 2024 · Graphene plasmonics on the structured metasurface demonstrate many exotic properties which can combine novel nanomaterials and well-established plasmonics, providing unique opportunities to develop a series of novel photonic, plasmonic and optoelectronic devices across a wideband spectrum. inanimate insanity pride month inanimate insanity prideWebApr 15, 2024 · Broadband terahertz tunable metasurface linear polarization converter based on graphene Zhang Hongtao et al., Opto-Electronic Engineering, 2024 Research progress of electromagnetic properties of … in a sphere the number of faces isWebMar 25, 2024 · Here, we experimentally demonstrate graphene metasurface modulators, each composed of metallic nanostructures and a dielectric cavity integrated with graphene, whose MWIR-LWIR reflection... inanimate insanity roleplayWebAug 23, 2024 · The TH power outflow of the proposed nonlinear graphene metasurface (black solid line) has the largest value in figure 5 compared to all the other scenarios: (a) the same dimensions as the graphene micro-ribbon metasurface on top of the same thickness dielectric layer but without gold substrate (purple dash-dotted line), (b) a uniform … inanimate insanity posters