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Robust Bound States in the Continuum in Mirror‐Symmetric Terahertz Metasurfaces

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
An ideal BIC, supported by local inversion symmetry in a mirror‐symmetric metasurface, transforms into a QBIC by introducing an asymmetry parameter α. This transition yields a finite Q‐factor following Q ∝ α−1.95, whereas the singular polarization state splits into two distinct circularly polarized points. This framework ensures robust BIC formation at
Die Zou, Zhen Zhou, Xia Cao, Rui Zhu, Keyu Tan, Zhiyong Wang, Xiaohua Xing, Jianquan Yao, Jianing Chen, Liang Wu   +9 more
wiley   +1 more source

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Imaging with terahertz waves

Optics Letters, 1995
We present what is to our knowledge the first imaging system based on optoelectronic terahertz time-domain spectroscopy. Terahertz time-domain waveforms are downconverted from the terahertz to the kilohertz frequency range, and the waveform for each pixel is frequency analyzed in real time with a digital signal processor to extract compositional ...
M C Nuss, B B Hu
exaly   +3 more sources

Toward real-time terahertz imaging

Advances in Optics and Photonics, 2018
Terahertz (THz) science and technology have greatly progressed over the past two decades to a point where the THz region of the electromagnetic spectrum is now a mature research area with many fundamental and practical applications.
Kathirvel Nallappan, Maksim Skorobogatiy, Hichem Guerboukha   +2 more
exaly   +2 more sources

Imaging with terahertz radiation

Reports on Progress in Physics, 2007
Within the last several years, the field of terahertz science and technology has changed dramatically. Many new advances in the technology for generation, manipulation, and detection of terahertz radiation have revolutionized the field. Much of this interest has been inspired by the promise of valuable new applications for terahertz imaging and sensing.
Chan, Wai Lam, Deibel, Jason A., Mittleman, Daniel M.   +2 more
openaire   +3 more sources

Continuous wave terahertz imaging for NDT: Fundamentals and experimental validation

, 2021
Continuous wave terahertz (CW THz) imaging, is a variant of terahertz imaging that has been gaining scientific and technological relevance in multiple areas.
Frederico B. Costa, M. Machado, G. Bonfait, P. Vieira, T. Santos   +4 more
semanticscholar   +1 more source

Near-Field Nanoscopic Terahertz Imaging of Single Proteins.

Small, 2020
Terahertz (THz) biological imaging has attracted intense attention due to its capability of acquiring physicochemical information in a label-free, noninvasive, and nonionizing manner.
Zhongbo Yang, Dongyun Tang, Jiao Hu, Mingjie Tang, Mingkun Zhang, H. Cui, Lihua Wang, Chao Chang, C. Fan, Jiang Li, Huabin Wang   +10 more
semanticscholar   +1 more source

3D Terahertz Confocal Imaging with Chromatic Metasurface

Laser & Photonics Reviews
Terahertz confocal imaging allows 3D see‐through of a non‐metallic object with high resolution. Conventional methods acquiring 3D images of thick objects suffer from limited depth‐of‐field, constrained depth resolution, and/or inconsistent spatial ...
Xiaolong You, R. Ako, Sharath Sriram, W. Withayachumnankul   +3 more
semanticscholar   +1 more source

Terahertz Imaging of Biological Tissues

2011
A reflective THz imaging system sensitive to small variations in water concentrations has been developed. Biological tissues such as skin, eyes and teeth were imaged to ascertain the systems response to tissue hydration. Difference in water concentrations translated to contrast in the THz images.
Priyamvada Tewari, Zachary D. Taylor, David Bennett, Rahul S. Singh, Martin O. Culjat, Colin P. Kealey, Jean Pierre Hubschman, Shane N. White, Alistair Cochran, Elliott R. Brown, Warren S. Grundfest   +10 more
openaire   +2 more sources

3D-printed aberration-free terahertz metalens for ultra-broadband achromatic super-resolution wide-angle imaging with high numerical aperture

Nature Communications
Terahertz (THz) lens constitutes a vital component in the THz system. Metasurfaces-based THz metalenses and classical bulky lenses are severely constrained by chromatic/ spherical aberration and the diffraction limit.
Jin Chen, Shao-Xin Huang, K. Chan, Geng-bo Wu, C. Chan   +4 more
semanticscholar   +1 more source

Quasi-optic terahertz imaging

Optics Letters, 2001
We demonstrate quasi-optical, diffraction-limited two-dimensional image production by means of reflected pulses of terahertz (THz) radiation. A spherical mirror is used to form a real one-to-one THz image of two 1-mm-diameter steel spheres, which is then scanned over a THz receiver.
J, O'Hara, D, Grischkowsky
openaire   +2 more sources