Graphene metasurface
WebApr 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 ... WebThe development of patterned graphene metasurface absorbers (PGMAs) brings solution avenues to achieve light weight, thin thickness, wide absorption bandwidth, and tunable …
Graphene metasurface
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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 … WebGraphene-empowered dynamic metasurfaces and metadevices Article navigation > Opto-Electronic Advances > 2024 Vol. 5 > No. 4 > 200098 Citation: Zeng C, Lu H, Mao D, Du YQ, Hua H et al. Graphene-empowered dynamic metasurfaces and metadevices. Opto-Electron Adv 5, 200098 (2024). doi: 10.29026/oea.2024.200098 Review Open Access
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 WebDec 12, 2024 · Graphene oxide is a material that can be incorporated with metamaterials which improve broadband absorption (Saurabh et al. 2024 ). Plus-shaped metasurface based on graphene material creates a resonating structure that absorbs broadband absorption which results in a broadband absorber (Patel et al. 2024 ).
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 … WebApr 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.
WebIn this work, a double-layer graphene metasurface based absorber (GMSA) with tunable absorption window and intensity has been proposed for the THz regime. Utilizing the electrically tunable property of graphene, the two graphene layers play the roles of absorption window modulation layer and absorption intensity modulation layer …
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 ... cisco and netapp flexpod design specialistWebNov 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 … cisco and polycomWebAug 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 … diamond power transformers ltdWebSep 29, 2024 · A Broadband solar absorber using graphene metasurface is designed to absorb the visible region. The absorber is enhancing the absorption using graphene … cisco and servicenowWebJan 1, 2024 · Abstract. We study an independently tunable Fano resonance from quasibound state in the continuum and polarization-independent toroidal dipole resonance in hybrid graphene–dielectric metasurface consisting of a nanoring and a cross-shaped nanobar. The unique structural properties of the proposed metasurface can support … cisco and redskyWebAug 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... diamond power systems apuWebApr 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 … cisco and human resources