Terahertz beam shaping
WebAug 28, 2024 · A flat-top beam is preferred to a normal Gaussian beam for various imaging applications since it provides more uniform illumination over a scene. In this paper, we present a highly efficient tri-layer metasurface lens for terahertz beam shaping, namely Gaussian to flat-top beam conversion. This metasurface includes linear polarization … WebApr 12, 2024 · A high-speed programmable and scalable terahertz holographic metasurface based on tiled. CMOS chips[J]. Nature Electronics, 2024, 3(12): 785-793. [30] MONROE N M, DOGIAMIS G C, STINGEL R, et al. Electronic THz. pencil beam forming and 2D steering for high angular-resolution operation: a 98-unit 265GHz CMOS reflectarray with in-unit …
Terahertz beam shaping
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WebPhase waveplates for THz beam shaping. The principle is quite simple: a 3D printer prints a waveplate with variable thickness across the waveplate area. The waveplate modulates the THz source’s electromagnetic radiation phase and … WebTerahertz beams shaping technique employs plastic screens for phase shifting NEWS Mar 29, 2024 There are countless known APPLICATIONS for terahertz technology, but there …
WebAug 2, 2024 · The formation of broadband terahertz vortex and vector beams attracts increasing attention due to the prospects for using such beams in telecommunications, imaging, and sensing of material properties. One of the most effective ways for THz beam shaping is geometric phase approach based on a spin-orbit conversion principle. WebAug 28, 2024 · A flat-top beam is preferred to a normal Gaussian beam for various imaging applications since it provides more uniform illumination over a scene. In this paper, we …
WebWe propose a topological beam-shaping strategy of terahertz (THz) beams using geometric phase elements made of space-variant birefringent slabs. Quasi … Web: In this article we propose variable-period diffraction gratings for terahertz frequencies. The design, fabrication and characterization of such devices are presented. Our measurements show the possibility to actively shift of the deflection angle for each frequency using this device. We also demonstrated that when driven by a speaker, these …
WebFeb 21, 2024 · The metasurfaces can be divided into two categories: passive and active metasurfaces. For the passive metasurfaces, the single-functional metasurfaces, multifunctional metasurfaces, and high diffraction efficient metasurfaces designed for various THz wavefront shaping, such as focusing, imaging, and special beams generating, are …
WebJul 11, 2024 · The team recently published a paper on their work, titled “3D-printed phase waveplates for THz beam shaping,” in Applied Physics Letters; co-authors include Gosporadič, A. Kuzmenko, Anna ... bucovina mapaWebOct 31, 2024 · Terahertz frequencies still lacking in efficient, easily accessible and inexpensive emission and registration components, however, in addition, there is a … bucovina radauti liga 3WebDec 14, 2024 · A dynamically programmable array of terahertz meta-elements, in which each element can be individually reconfigured to allow controlled wavefront shaping, could be of value in terahertz ... bucovina spune tu vantbucovina maps google mapsWebMar 18, 2024 · A bi-functional metagrating capable of anomalous refraction and beam splitting via asymmetric diffraction is designed, 3D-printed and experimentally verified at 0.14 THz. ... Our work opens a new avenue in developing multifunctional and compact terahertz devices for wavefront shaping via excitation directions. Published in: IEEE Photonics ... bucovina radautiWebTo further demonstrate the anisotropy of the silicon unit cell, the authors designed and fabricated several prototypes of metasurfaces, among which the most conspicuous one was proposed to realize bi-functional beam shaping. Under x-polarized terahertz incidence, this prototype was verified to serve as an OAM beam generator, while under y ... bucovina ouaWebA 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 … bucovina sa