Results 41 to 50 of about 157,954 (272)

Inverse Design of Terahertz Optical Power Splitters Using the Particle Swarm Optimization Method [PDF]

Journal of Electromagnetic Engineering and Science, 2023
This letter proposes 50:50 TE terahertz power splitters based on digitized metamaterials. The components are optimized using the particle swarm optimization algorithm.
Kiyanoush Goudarzi, Han-eol Lee, Doyoung Kim, Ikmo Park, Haewook Han   +4 more
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Multifunctional and dynamically tunable terahertz metamaterials based on TiNi shape memory alloy films with a simple design

Results in Physics, 2021
In the terahertz (THz) fields, a crucial point of restricting its development and application is the lack of dynamic and multifunctional materials. In this work, NiTi films are innovatively introduced into the design, and multifunctional and dynamically ...
Changlong Tan, Juan Liu, Xiaohua Tian, Jiachen Zhu, Kun Zhang   +4 more
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Optically thin terahertz metamaterials

Optics Express, 2008
Resonant properties of optically thin metamaterials are studied by terahertz time-domain spectroscopy. Both the lower energy inductor-capacitor (LC) and the higher energy dipole resonances of the planar double split-ring resonators (SRRs) exhibit characteristic evolution with various sub-skin-depth thicknesses of the constituent Pb film.
Ranjan, Singh, Evgenya, Smirnova, Antoinette J, Taylor, John F, O'Hara, Weili, Zhang   +4 more
openaire   +2 more sources

Terahertz metamaterial devices [PDF]

SPIE Proceedings, 2007
Compared to the neighboring infrared and microwave regions, the terahertz regime is still in need of fundamental technological advances. This derives, in part, from a paucity of naturally occurring materials with useful electronic or photonic properties at terahertz frequencies. This results in formidable challenges for creating the components needed
R. D. Averitt, W. J. Padilla, H. T. Chen, J. F. O'Hara, A. J. Taylor, C. Highstrete, M. Lee, J. M. O. Zide, S. R. Bank, A. C. Gossard   +9 more
openaire   +1 more source

Comparison of gold- and graphene-based resonant nano-structures for terahertz metamaterials and an ultra-thin graphene-based modulator [PDF]

, 2014
Graphene exhibits unique material properties and in electromagnetic wave technology, it raises the prospect of devices miniaturized down to the atomic length scale.
Koschny, Thomas, Shen, Nian-Hai, Soukoulis, Costas M., Tassin, Philippe   +3 more
core   +2 more sources

Random terahertz metamaterials [PDF]

Journal of Optics, 2009
Using terahertz time domain spectroscopy we investigate the normal incidence transmission through periodically and randomly arranged planar split ring resonators (SRRs). Introduction of positional disorder in metamaterials has no effect on the quality factor of the fundamental Inductive-Capacitive (LC) resonance.
Singh, Ranjan, Lu, Xinchao, Gu, Jianqiang, Tian, Zhen, Zhang, Weili   +4 more
openaire   +2 more sources

Applications of Terahertz Spectroscopy in the Detection and Recognition of Substances

Frontiers in Physics, 2022
Recently, terahertz spectroscopy has received a lot of attention because of its unique properties such as biosafety, fingerprint spectrum, and good penetration.
Xiaojian Fu, Xiaojian Fu, Yujie Liu, Qi Chen, Yuan Fu, Tie Jun Cui, Tie Jun Cui   +6 more
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A Terahertz Chiral Metamaterial Modulator [PDF]

Advanced Optical Materials, 2020
AbstractActive control of chirality in artificial media such as metamaterials is fundamental in many scientific areas, ranging from research into fundamental optical phenomena to the investigation of novel materials, spectroscopy, and imaging. Precise control of the light polarization states has great importance for light‐matter interaction in ...
Stephen J. Kindness, Nikita W. Almond, Wladislaw Michailow, Binbin Wei, Kaveh Delfanazari, Philipp Braeuninger‐Weimer, Stephan Hofmann, Harvey E. Beere, David A. Ritchie, Riccardo Degl'Innocenti   +9 more
openaire   +2 more sources

Terahertz reconfigurable multi-functional metamaterials based on 3D printed mortise-tenon structures

Virtual and Physical Prototyping, 2023
The emergence of metamaterial has provided an unprecedented ability to manipulate electromagnetic waves, especially in the terahertz band where there is a lack of natural response materials.
Bo Yu, Lesiqi Yin, Peng Wang, Cheng Gong
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Regulation of the transmission characteristics of terahertz metamaterials based on CS2

Dianzi Jishu Yingyong, 2019
At present, optically controlled terahertz band metamaterials are mainly realized by changing the carrier concentration of semiconductor materials with laser.
Shi Yilin, Yang Suying, Gao Yachen
doaj   +1 more source