Graphene-based hyperbolic metamaterial
WebA 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 frequency range of surface Bloch waves … WebMay 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 …
Graphene-based hyperbolic metamaterial
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WebFigure 1. Graphene-based multilayer HM topology, comprises graphene sheets as inductive surfaces stacked with dielectric spacers leading to hyperbolic dispersion at terahertz and … WebThe proposed graphene-based harmonic sensor may potentially benefit a wide range of sensing applications, including, but not limited to, power-efficient, real-time monitoring of chemical/gas ...
WebJun 7, 2024 · Photoexcited graphene can behave as the gain medium aiming to come up with the coherent radiation at low THz spectral region. However, its response is very … WebJul 13, 2013 · Graphene-based hyperbolic metamaterial Abstract: We introduce a graphene-based composite multilayer structure that exhibits hyperbolic-like wavevector dispersion at terahertz and mid-infrared frequencies. The multilayer structure comprises graphene sheets separated by dielectric layers.
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 … WebMar 2, 2024 · A tunable graphene-based hyperbolic metamaterial is designed and numerically investigated in the mid-infrared frequencies. Theoretical analysis proves …
WebJun 27, 2014 · The numerical calculations for the effective permittivities of the graphene-based hyperbolic metamaterials, the theoretical absorption spectrum and the …
WebMar 2, 2024 · A tunable graphene-based hyperbolic metamaterial is designed and numerically investigated in the mid-infrared frequencies. Theoretical analysis proves that by adjusting the chemical potential of graphene from 0.2 eV to 0.8 eV, the reflectance can be blue-shifted up to 2.3 µm. Furthermore, by modifying the number of graphene … daniele mazzoniWebJun 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 … marisu fnia novelWebOct 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 … marist university divisionWebGraphene 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. daniele massaro pes statsWebNov 1, 2024 · So, we have selected graphene-based hyperbolic metamaterial as a defect layer, in which graphene is placed between the adjacent dielectric layers. PCs are able to create a range of disallowed bands of wavelengths known as photonic band gaps (PBGs) [37, 38]. What makes PCs to be the exceptional materials is their tunability by allowing or ... daniele massaro milanWebNov 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 … daniele massaro moglieWebFeb 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.... marisuplog cagliari