Graphene metasurface
WebMar 23, 2024 · The metasurface is designed by placing graphene ribbons on a dielectric cavity resonator, where interplay between geometric plasmon resonances in the ribbons and Fabry-Perot resonances in the cavity is used to achieve a 2 π phase shift. As a proof of concept, we demonstrate that the wave front of the field reflected from a triangular bump ... 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 …
Graphene metasurface
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Web1 day ago · Researchers report record-high magnetoresistance that appears in graphene under ambient conditions. Materials that strongly change their resistivity under magnetic … WebJan 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 …
WebJan 12, 2024 · Graphene-Based Metasurface for Tunable Absorption and Transmission Characteristics in the Near Mid-Infrared Region Abstract: This article reports a graphene-based metasurface to work at terahertz domain as a wideband tunable absorber along with a property of electromagnetic transmittivity. 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
WebHybrid metasurface using graphene/graphitic carbon nitride heterojunction for ultrasensitive terahertz biosensor with tunable energy band structure Zhaoqing Sun, … 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 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...
WebApr 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 … how to set up freestyle libre 2 appWebMar 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 … how to set up dial up internetWebMay 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, … how to set up hashcatWebJul 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. how to set up an ach payment bank of americaWebMar 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 … how to set up evenflo pivot strollerWebGraphene under optical pump has been shown to be an attractive gain medium with negative dynamic conductivity at terahertz frequencies. However, the amplification over a … how to set up inpaWebMar 1, 2015 · By properly constructing the graphene metasurface, broadband absorption over 70% fraction bandwidth has been achieved, showing that graphene can provide a … how to set up for baby chicks