Graphene metasurface

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 … WebNov 1, 2024 · In this paper, we focus on the realization of metasurface carpet cloak with broadband, wide-angle and polarization-insensitive invisibility. For this purpose, an …

Efficiency-tunable terahertz focusing lens based on …

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 … WebNov 3, 2024 · Owing to the outstanding physical properties of graphene, its biosensing applications implemented by the terahertz metasurface are widely concerned and studied. Here, we present a novel design of the graphene metasurface, which consists of an individual graphene ring and an H-shaped graphene structure. The graphene … optisol19 https://grupomenades.com

Ultra-thin and high-efficiency graphene metasurface for tunable ...

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 WebGraphene under optical pump has been shown to be an attractive gain medium with negative dynamic conductivity at terahertz frequencies. However, the amplification over a … 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 … optisolis 日亜

A broadband vortex beam generator using graphene metasurface ...

Category:Magnetically Tunable Graphene-Based Terahertz Metasurface

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Graphene metasurface

Graphene-Based Metasurface for Tunable Absorption and …

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 … WebMar 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...

Graphene metasurface

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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, … 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 ...

Web1 day ago · Researchers report record-high magnetoresistance that appears in graphene under ambient conditions. Materials that strongly change their resistivity under magnetic … WebFeb 24, 2024 · A KAIST research team in collaboration with the University of Wisconsin-Madison theoretically developed a graphene-based active metasurface capable of …

WebAug 10, 2024 · Graphene-based metasurface nearly perfect absorbers (MPAs) can be used as an efficient tool for the active control and manipulation of waves in the terahertz (THz) gap. 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...

Webresponds to anticlockwise rotation of the top active graphene metasurface. During the numerical calculation, the temperature of bot-tom passive layer T 1 is fixed at room …

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 … optisol solar mobile chargerWebSep 29, 2024 · A Broadband solar absorber using graphene metasurface is designed to absorb the visible region. The absorber is enhancing the absorption using graphene … portofino harbour italyWebApr 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 … portofino hand-wound eight daysWebJan 12, 2024 · Graphene-Based Metasurface for Tunable Absorption and Transmission Characteristics in the Near Mid-Infrared Region. Abstract: This article reports a … portofino harbour nightsWebApr 13, 2024 · The metasurface, which is surrounded by BPMAs, plays a critical role in the cloaking required for scattering cancellation. The parameters of the metasurface that can be manipulated for cloaking include the dielectric constant of the host ( ɛ r , h ), the height of the host ( h host ), and slot width ( s w ) between the unit elements as shown ... portofino historyWebSep 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 ). optison echo contrastWebAug 20, 2024 · A graphene-only metasurface device of the same design was fabricated and found to not possess observable resonant behavior up to 50 V applied voltage (see Supplementary Fig. 3 ). This was... portofino heights address