Results 31 to 40 of about 157,954 (272)

Enhanced terahertz third-harmonic generation by bound states in the continuum in graphene grating-like metamaterial

Frontiers in Physics, 2023
Non-linear metamaterials hold great promise for enhanced terahertz harmonic generation. Here, we numerically investigate enhanced terahertz third-harmonic generation (THG) by exploiting the symmetry-protected bound states in the continuum (BICs) in ...
Baoku Wang, Jing Liu, Jinhui Cui, Jialin Liu, Fengjun Tian, Weimin Sun, Li Li, Li Li   +7 more
doaj   +1 more source

Terahertz Metamaterials for Linear Polarization Conversion and Anomalous Refraction [PDF]

Science, 2013
Converting Polarization The conversion of a light signal from one polarization direction to another plays an important role in communication and metrology. The components that are presently used for polarization conversion, however, tend to be relatively
N. Grady, J. Heyes, D. R. Chowdhury, Yong Zeng, M. Reiten, A. Azad, A. Taylor, D. Dalvit, Houtong Chen   +8 more
semanticscholar   +1 more source

VO2-enabled transmission-reflection switchable coding terahertz metamaterials.

Optics Express, 2022
Coding metamaterials have offered unprecedented degrees of freedom to manipulate electromagnetic waves in time and frequency domains in terms of various coding sequences, however, it is still challenging to realize dynamic coding metamaterials in the ...
Mengke Sun, Tianshuo Lv, Ziying Liu, Fatian Wang, Wenjia Li, Yang Zhang, Zheng Zhu, C. Guan, Jin-hui Shi   +8 more
semanticscholar   +1 more source

Potential terahertz therapeutic strategy for the prevention or mitigation of Alzheimer’s disease pathology

Light: Science & Applications, 2023
With terahertz irradiation with a specific frequency, the fibrotic progression of β-amyloid oligomers is suppressed, which provides a potential therapeutic strategy for Alzheimer’s disease.
Xinke Wang, Yan Zhang
doaj   +1 more source

Metamaterial-Based Terahertz Imaging [PDF]

IEEE Transactions on Terahertz Science and Technology, 2015
This article presents the design of an innovative, low-cost, uncooled, metamaterial based terahertz (THz) focal plane array (FPA). A single pixel is composed of a resonant metamaterial absorber and micro-bolometer sensor integrated in a standard 180 nm CMOS process.
Escorcia Carranza, Ivonne, Grant, James, Gough, John, Cumming, David R.S.   +3 more
openaire   +1 more source

Recent progress in terahertz metamaterial modulators

Nanophotonics, 2022
The terahertz (0.1–10 THz) range represents a fast-evolving research and industrial field. The great interest for this portion of the electromagnetic spectrum, which lies between the photonics and the electronics ranges, stems from the unique and ...
Degl’Innocenti Riccardo, Lin Hungyen, Navarro-Cía Miguel   +2 more
doaj   +1 more source

Accurate Local Modulation of Graphene Terahertz Metamaterials by Direct Electron Beam Irradiation

Photonics, 2022
Electrical gating has been typically used for Graphene-based devices to deliver high performance with superior electrical controllability. In this study, we utilize direct electron beam irradiation to attain the electrical controllability of graphene ...
Zhuocheng Zhang, Xiaoqiuyan Zhang, Min Hu, Tianyu Zhang, Xingxing Xu, Tao Zhao, Yanyu Wei, Yubin Gong, Shenggang Liu   +8 more
doaj   +1 more source

Active KTaO3 hybrid terahertz metamaterial [PDF]

Scientific Reports, 2017
AbstractThe dielectric properties of an active KTaO3 hybrid metamaterial structure and its tunability under external electric fields are investigated at room temperature by means of terahertz time-domain spectroscopy. Application of the electric field leads to an appreciable tuning of the dielectric loss, which is up to 17%.
Liang Wu, Jinglong Liu, Hui Li, Chunfeng Ding, Ningning Xu, Xiaolei Zhao, Zongcheng Xu, Quan Sheng, Jianquan Yao, Jining Li, Xin Ding, Weili Zhang   +11 more
openaire   +3 more sources

Vanadium Dioxide-Based Terahertz Metamaterial Devices Switchable between Transmission and Absorption

Micromachines, 2022
Terahertz metamaterial plays a significant role in the development of imaging, sensing, and communications. The function of conventional terahertz metamaterials was fixed after fabrication.
Haoqing Jiang, Yue Wang, Zijian Cui, Xiaoju Zhang, Yongqiang Zhu, Kuang Zhang   +5 more
doaj   +1 more source

Metamaterials in the Terahertz Regime

IEEE Photonics Journal, 2009
Metamaterials are artificial composites that acquire their electromagnetic properties from embedded subwavelength metallic structures. In theory, the effective electromagnetic properties of metamaterials at any frequency can be engineered to take on ...
Withawat Withayachumnankul, Derek Abbott
doaj   +1 more source