Graphene-based hyperbolic metamaterial
WebMar 2, 2024 · A tunable graphene-based hyperbolic metamaterial is designed and numerically investigated in the mid-infrared frequencies. Theoretical analysis proves … WebJun 9, 2024 · Graphene-based hyperbolic metamaterials are well known for their optical anisotropy, high absorption of electromagnetic radiation, and low energy loss. We proposed a novel multilayer graphene-silica hyperbolic metamaterial designed as a grating structure providing narrowband near-perfect absorption of radiation in a mid-infrared band. The …
Graphene-based hyperbolic metamaterial
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WebFeb 10, 2014 · A kind of tunable hyperbolic metamaterial (HMM) based on the graphene-dielectric layered structure at near-infrared frequencies is presented, and the engineered surface Bloch waves between graphene-based HMM and isotropic medium are investigated. Our calculations demonstrate that the frequency and f … WebNov 28, 2013 · Graphene-based hyperbolic metamaterials exhibit a strong Purcell effect that could be used for boosting terahertz emission in semiconductor devices. Nature Photonics offers a unique mix of news and reviews alongside top-quality …
WebSep 1, 2024 · The combination of graphene and metallic metamaterials is the best means to attain active control of the electromagnetic wave. A C-shaped unit cell with a graphene … WebFeb 4, 2016 · Graphene is a two-dimensional (2D) semi-metal with a thickness of only one atom 22, 23. It has been shown that doped graphene is a good infrared plasmonic material in terms of material loss 24....
WebDec 22, 2014 · On the other hand, due to two dimensional nature and metallic characteristics of graphene in the frequency range where hexagonal Boron Nitride behaves as a type-I hyperbolic Metamaterial, we have ... WebFigure 1. Graphene-based multilayer HM topology, comprises graphene sheets as inductive surfaces stacked with dielectric spacers leading to hyperbolic dispersion at terahertz and …
WebJun 27, 2014 · The numerical calculations for the effective permittivities of the graphene-based hyperbolic metamaterials, the theoretical absorption spectrum and the …
WebNov 29, 2024 · The structure under consideration (Fig. 1) consists of two building blocks: grating made of Si (\(\varepsilon = \varepsilon_{g} = 12.25\)) and a slab of graphene-dielectric metamaterial.The function of the first building block is creation of higher-order transmission channel(s). In such a case, the coupling of the incident waves differs for the … opena ai chat gbtWebOct 28, 2013 · We demonstrate that 100% light absorption can be achieved in a graphene-based hyperbolic metamaterial, consisting of periodically arranged graphene layers which are tilted with respect to the interface. The geometrical parameters of the multilayered structure and the chemical potential of graphene are chosen in such a way that the in … open a absa bank account onlineWebApr 21, 2015 · We propose and theoretically explore terahertz amplification, based on stimulated generation of plasmons in graphene asymmetric hyperbolic metamaterials (AHMM), strongly coupled to terahertz radiation. In contrast to the terahertz amplification in resonant nanocavities, AHMM provides a wide-band THz amplification without any … iowa hawkeye football schedule 2020-21WebRef. studied an NFTPV system consisting of a tungsten-nanowire-based hyperbolic metamaterial emitter and an In 0.2 Ga 0.8 Sb cell. By optimizing the filling ratio of Al 2 O 3, the maximum electric power peaked at 58.0 W/cm 2 thanks to the high temperature difference between the emitter and the receiver. Ref. open a app in windows 11WebApr 1, 2024 · In this work, we propose a tunable hyperbolic graphene-polar dielectric metamaterial in the far-infrared range. Here, we employ LiF as a strongly dispersive photonic material which can support surface plasmon polariton within its polaritonic gap. The proposed metamaterial has been analyzed using effective medium approximation … iowa hawkeye football schedule 2007WebMay 24, 2024 · Hexagonal boron nitride (hBN) exhibits natural hyperbolic dispersion in the infrared (IR) wavelength spectrum. In particular, the hybridization of its hyperbolic phonon polaritons (HPPs) and surface plasmon resonances (SPRs) induced by metallic nanostructures is expected to serve as a new platform for novel light manipulation. In this … iowa hawkeye football schedule 2021 seasonWebGraphene based hyperbolic metamaterial for tunable mid-infrared biosensing Sarah Cynthia, a Rajib Ahmed, b Sharnali Islam, a Khaleda Ali a and Mainul Hossain *a Author affiliations Abstract Plasmonic biosensors, operating in the mid-infrared (mid-IR) region, are well-suited for highly specific and label-free optical biosensing. iowa hawkeye football schedule 2021