Graphene-based hyperbolic metamaterial

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August undefined, 2024

WebJun 27, 2014 · Graphene-based hyperbolic metamaterials Our graphene-based HMM is representatively shown in Fig. 1 (a). It is a graphene multilayer structure in which separations between graphene sheets... 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 …

Tunable Slow Light with Graphene based Hyperbolic Metamaterial

WebGraphene-based hyperbolic metamaterials provide a unique scaffold for designing nanophotonic devices with active functionalities. In this work, we have theoretically demonstrated that the characteristics of a polarization-dependent tunable hyperbolic microcavity in the mid-infrared frequencies could be realized by modulating the thickness … WebFeb 5, 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 ... fixed up movie

Recent and emerging applications of Graphene-based …

WebJun 15, 2024 · HMMs are considered by employing multiple stacked photoexcited graphene sheets divided by dielectric spacers. Herein, we study and characterize the hyperbolic … 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 … 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 … fixed up trucks for sale

Hyperbolic metamaterials Nature Photonics

Graphene-based Hyperbolic Metamaterial at Terahertz …

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 … WebNov 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 ... can midland credit garnish wagesWebSep 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 … can midodrine increase blood pressure

"WebWe introduce graphene-based hyperbolic metamaterial for terahertz frequencies. The LDOS as well as the scattered power by a microsphere at its surface are enhanced by … " - Graphene-based hyperbolic metamaterial

Graphene-based hyperbolic metamaterial

WebFigure 1. Graphene-based multilayer HM topology, comprises graphene sheets as inductive surfaces stacked with dielectric spacers leading to hyperbolic dispersion at terahertz and … WebApr 10, 2024 · Coupling of surface plasmon polaritons (SPPs) supported by graphene and hyperbolic phonon polaritons (HPPs) supported by hyperbolic materials (HMs) could effectively promote photo

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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 … 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 …

WebApr 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 … WebMar 18, 2024 · Based on the optimized processing parameters, we fabricated a large-area graphene-based metamaterial absorber (25 × 50 mm 2, Fig. 3b) and tested its photothermal performance. The absolute ...

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. WebThis work introduces a parallel computing framework to characterize the propagation of electron waves in graphene-based nanostructures. The electron wave dynamics is modeled using both “microscopic” and effective medium formalisms and the numerical solution of the two-dimensional massless Dirac equation is determined using a Finite-Difference Time …

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 ...

WebDec 22, 2014 · Here we theoretically propose and numerically analyze a graphene based tunable slow light device from the concept of controlling the group velocity of light in … can midlife crisis happen earlyWebApr 21, 2015 · We propose and theoretically explore terahertz amplification, based on stimulated generation of plasmons in graphene asymmetric hyperbolic metamaterials … can midodrine increase heart rateWebGraphene 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. fixed uyWebJun 27, 2014 · The numerical calculations for the effective permittivities of the graphene-based hyperbolic metamaterials, the theoretical absorption spectrum and the … can midodrine affect heart rate can midland credit sue meWebJul 13, 2013 · Graphene-based hyperbolic metamaterial. Abstract: We introduce a graphene-based composite multilayer structure that exhibits hyperbolic-like … fixed urlWebFeb 1, 2024 · The graphene plasmonic nano-ribbons are used and silicon slabs are improvised between the graphene to reduce its drawback by providing a hyperbolic metamaterial lens. Abstract Demand for an antenna with high gain and directivity for medical sensing is necessary so the Vivaldi antenna in the THz spectrum with … fixed upper denture cost