Terahertz metamaterials and metasurfaces
Web2 days ago · by SPIE. Optically controlled metasurfaces achieve dynamic dual-mode modulation by varying the wavelength of pumping light. Credit: Advanced Photonics (2024). DOI: 10.1117/1.AP.5.2.026005. Dynamic ... WebMetasurfaces, composed of prearranged artificial unit cells possessing different electromagnetic (EM) responses, provide unprecedented abilities to realize versatile wave manipulations. Especially in the terahertz spectrum, metasurfaces attract broad attention by opening up further possibilities for wave regulating. Terahertz applications in various …
Terahertz metamaterials and metasurfaces
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WebWe report a tunable terahertz (THz) metamaterial absorber (MA) actuated by thermomechanical bimaterial microcantilevers. The THz MA, which is suspended on a … WebMar 2, 2015 · Recently, metasurfaces operating in the THz frequency range have been used in chemical and biological sensing with enhanced sensitivities to microenvironmental variations, by taking advantage of...
WebIn this work, we integrate carbon nanotubes metasurface (CM) and microfluidic channel (MC) for a composite terahertz (THz) metasurface (CMMC). The absorption properties and sensing performance of the proposed composite metasurface have been studied. It is observed that the absorption is nearly 71.8% at 0.96 THz and 92.4% at 1.65 THz, … WebAug 20, 2024 · Metamaterials or metasurfaces consist of periodic arrays of subwavelength unit cells, which exhibit properties unattainable from natural materials by imitating the …
Web1 day ago · The conversion from a low- to high-bit programmable metasurface using a spatiotemporal metasurface. • The space-time-coding metasurfaces aiding in the … WebA uniform illumination over a screen is crucial for terahertz imaging. As such, conversion from a Gaussian beam to a flattop beam becomes necessary. Most of the current beam conversion techniques rely on bulky multi-lens systems for collimated input and operate in the far-field. We present a single metasurface lens to efficiently convert a quasi-Gaussian …
WebTerahertz nano-devices and nano-systems. Y. Kawano, in Handbook of Terahertz Technology for Imaging, Sensing and Communications, 2013 13.1 Introduction. …
Web1 day ago · The conversion from a low- to high-bit programmable metasurface using a spatiotemporal metasurface. • The space-time-coding metasurfaces aiding in the realization of the function of wide-band terahertz vortex beam generator switching according to the vortex phase arrangement and their combination with the convolution theory resulting in … mehron synwax tutorialWebFeb 18, 2024 · Metamaterials, artificially composed structures that can engineer the electromagnetic properties to manipulate the waves, have enabled the development of … nan singapore facebookWebNov 3, 2024 · Graphene-based metamaterials or metasurfaces are usually polarization sensitive and invalid for non-normal incidence, leading to the degradation and disappearance of the sensing capability . In this work, we propose a planar graphene metasurface, which is composed of a circular graphene ring and an H-shaped graphene … nans in pythonWebA uniform illumination over a screen is crucial for terahertz imaging. As such, conversion from a Gaussian beam to a flattop beam becomes necessary. Most of the current beam … mehron tester boardWebMar 2, 2015 · One of the most promising routes is to use metamaterials (or their two-dimensional version, metasurfaces). Metamaterials, artificial materials consisting of periodically arranged, sub-wavelength ... mehron water activated paintWebNatural materials usually have limited interactions with terahertz waves and would require large material thickness or high drive voltage to obtain a significant modulation depth. … mehron tooth paintWebSep 1, 2007 · In recent years, various methods have been proposed to realize tunable terahertz metasurfaces, ... We present experimental results of metamaterials … mehron syn wax for scars