Results 101 to 110 of about 40,370 (319)

High‐Numerical‐Aperture, 3D‐Printed All‐Dielectric Harmonic Diffraction Metalens in the Sub‐THz Frequency Range

Advanced Photonics Research, EarlyView.
Herein, a compact all‐dielectric metalens operating at dual sub‐THz frequencies is presented, addressing key challenges in terahertz device miniaturization. Utilizing commercial 3D printing, the metalens achieves high numerical aperture and broadband functionality.
Kobi Ben Atar, Jacob Engelberg, Uriel Levy   +2 more
wiley   +1 more source

Measuring the radiation hardness of terahertz devices for space applications

Communications Physics
The application of terahertz technology in space is frontier for the development of 6G technologies. Terahertz transceiver devices based on gallium arsenide Schottky barrier diodes (GaAs SBDs) have the characteristics of small size, light weight and low ...
Yuan-Zhi He, Chen-Sheng Ma, Hao Yin
doaj   +1 more source

Enhancement of Terahertz radiation due to excitation of SPW on graphene strip coated on GaAs structure

Results in Optics, 2023
The present study proposes a methodology for improving terahertz (THz) radiation through the utilisation of a laser directed towards a graphene strip that has been coated onto a GaAs structure.
Sandeep, Hitendra K. Malik
doaj  

Exploiting the optical quadratic nonlinearity of zincblende semiconductors for guided-wave terahertz generation: a material comparison

, 2009
We present a detailed analysis and comparison of dielectric waveguides made of CdTe, GaP, GaAs and InP for modal phase matched optical difference frequency generation (DFG) in the terahertz domain.
Bivona, Saverio, Busacca, Alessandro C., Cherchi, Matteo, Cino, Alfonso C., Leone, Claudio, Oliveri, Roberto L., Sanseverino, Stefano Riva, Stivala, Salvatore, Taormina, Alberto   +8 more
core   +1 more source

Switchable Terahertz Beam Steering with Near‐Perfect Ordinary Transmission

Advanced Photonics Research, EarlyView.
This study introduces a reconfigurable metasurface that enables switchable terahertz beam steering upon actuation by a global temperature change. At room temperature, it achieves a true “OFF” state with nearly 100% transmission, behaving as if the metasurface is not present, thereby not distorting incoming light.
Zhixiang Huang, Jie Ji, Ke Ma, Eric Herrmann, Riad Yahiaoui, S M Jahadun Nobi, Fei Ding, Peter Uhd Jepsen, Thomas A. Searles, Binbin Zhou, Zizwe Chase, Xi Wang   +11 more
wiley   +1 more source

Exceptional Second Harmonic Generation in Ultraviolet Nonlinear Optical Oxyfluoroniobate Crystals via Structural Fingerprint Optimization of Polar Chains

Angewandte Chemie, EarlyView.
A structural fingerprint optimization strategy is proposed for the 1[TMOF4]∞ chain‐based compounds, aimed at modifying the geometric features of functional chains to maximize the optical nonlinearity. In the ultraviolet (UV) nonlinear optical (NLO) crystal (H3O)(Biu)2(NbOF4), the structural fingerprints of the functional chains satisfy the ideal ...
Congcong Jin, Yang Li, Jin Seong Kim, Jong‐Hoon Lim, Hongbo Huang, Chong‐An Chen, Jihyun Lee, Yejin Heo, Bingbing Zhang, Joon Ik Jang, Kang Min Ok   +10 more
wiley   +2 more sources

Terahertz radiation affects the dynamics of neurons by decreasing membrane area ratio

Brain Research Bulletin
Terahertz radiation at specific frequencies and energies can mediate cellular morphology or function changes by exciting nonlinear resonance effects in proteins or DNA.
Shaoqing Ma, Siyu Li, Huan Wang, Yingwei Li, Chengbiao Lu, Xiaoli Li   +5 more
doaj  

Modeling DNA response to terahertz radiation [PDF]

Physical Review E, 2011
Collective response of DNA to terahertz electric fields is studied in a simple pair bond model. We confirm, with some caveats, a previous observation of destabilizing DNA breather modes and explore the parameter dependence of these modes. It is shown that breather modes are eliminated under reasonable physical conditions and that thermal effects are ...
openaire   +3 more sources

Topological Berry Antenna on a Silicon Chip for Terahertz Wireless Communication

Advanced Photonics Research, EarlyView.
The on‐chip topological Berry antenna for 6G to Xth‐generation wireless communication is designed via integrating various Berry curvatures for an enhanced antenna aperture and radiation gain. This THz antenna has demonstrated a maximum gain of 17 dBi and chip‐to‐chip wireless communications at 20 Gbps over a distance of 15 cm.
Sonu Kumar, Ridong Jia, Yi Ji Tan, Thomas Caiwei Tan, Pascal Szriftgiser, G. Arun Kumar, Guillaume Ducournau, Arokiaswami Alphones, Ranjan Singh   +8 more
wiley   +1 more source

All‐Dielectric Metasurface‐Based Gap Waveguides

Advanced Photonics Research, EarlyView.
Dielectric metasurface‐based waveguides (metawavegides) offer several advantages over conventional waveguides, making them ideal for integrated photonics. A design of a metawaveguide composed of a pair of dielectric metasurfaces is proposed, where each metasurface behaves as a wall of either a perfect electric conductor or a perfect magnetic conductor,
Vladimir R. Tuz, Vyacheslav V. Khardikov, Izzatjon Allayarov, Antonio Calà Lesina, Andrey B. Evlyukhin   +4 more
wiley   +1 more source