Results 41 to 50 of about 6,952,164 (288)

Terahertz spectral properties of glucose and two disaccharides in solid and liquid states

iScience, 2022
Summary: The vibrational and rotational frequencies of most biological macromolecules fall within the terahertz (THz) band; therefore, the THz wave has a strong ability to distinguish substances.
Haiyun Huang, Siyu Shao, Guoyang Wang, Ping Ye, Bo Su, Cunlin Zhang   +5 more
doaj   +1 more source

Identification of Bacterial Blight Resistant Rice Seeds Using Terahertz Imaging and Hyperspectral Imaging Combined With Convolutional Neural Network

Frontiers in Plant Science, 2020
Because bacterial blight (BB) disease seriously affects the yield and quality of rice, breeding BB resistant rice is an important priority for plant breeders but the process is time-consuming.
Jinnuo Zhang, Yong Yang, Xuping Feng, Hong-xia Xu, Jianping Chen, Yong He   +5 more
semanticscholar   +1 more source

Aspheric lenses for terahertz imaging

Optics Express, 2008
We present novel designs for aspheric lenses used in terahertz (THz) imaging. As different surfaces result in different beam shaping properties and in different losses from reflection and absorption, the resultant imaging resolution (i.e. the focal spot size) depends critically on the design approach.
Lo, Yat, Leonhardt, Rainer
openaire   +3 more sources

Full-Field Terahertz Imaging at Kilohertz Frame Rates Using Atomic Vapor

Physical Review X, 2020
There is much interest in employing terahertz (THz) radiation across a range of imaging applications, but so far, technologies have struggled to achieve the necessary frame rates.
L. Downes, Andrew R. Mackellar, Daniel J. Whiting, Cyril Bourgenot, C. Adams, K. Weatherill   +5 more
semanticscholar   +1 more source

A Review on Terahertz Technologies Accelerated by Silicon Photonics

Nanomaterials, 2021
In the last couple of decades, terahertz (THz) technologies, which lie in the frequency gap between the infrared and microwaves, have been greatly enhanced and investigated due to possible opportunities in a plethora of THz applications, such as imaging,
Jingya Xie, Wangcheng Ye, Linjie Zhou, Xuguang Guo, Xiaofei Zang, Lin Chen, Yiming Zhu   +6 more
doaj   +1 more source

Terahertz phase retrieval imaging in reflection [PDF]

Optics Letters, 2020
Terahertz phase retrieval is a promising technique able to assess the complex diffracted wave properties through an iterative processing algorithm. In this Letter, we demonstrate the implementation of this technique in reflection geometry with a continuous wave acquisition system working at 0.287 THz.
Nikolay V. Petrov, Jean-Baptiste Perraud, Adrien Chopard, Jean-Paul Guillet, Olga A. Smolyanskaya, Patrick Mounaix   +5 more
openaire   +3 more sources

Perspective on the applications of terahertz imaging in skin cancer diagnosis

International Journal of Electrical and Computer Engineering (IJECE)
Applications of terahertz (THz) imaging technologies have advanced significantly in the disciplines of biology, medical diagnostics, and non- destructive testing in the past several decades.
H. Owida, Jamal I. Al-Nabulsi, M. Al-Ayyad, Nidal M. Turab, Nawaf Alshdaifat   +4 more
semanticscholar   +1 more source

Dual Low-Rank Constrained Self-Representation Learning for Unsupervised SAR Image Change Detection

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Change detection (CD) in bitemporal synthetic aperture radar images has been an important research direction in remote sensing intelligent interpretation.
Weisong Li, Yinwei Li, Yiming Zhu
doaj   +1 more source

Terahertz Broadband Polarization Conversion for Transmitted Waves Based on Graphene Plasmon Resonances

Nanomaterials, 2020
We applied the harmonic oscillator model combined with the transfer matrix method to study the polarization conversion for transmitted waves in metallic grating/plasmon-excitation layer/metallic grating structure in the terahertz (THz) region.
Anqi Yu, Dahai Yu, Zhenyu Yang, Xuguang Guo, Yuxiang Ren, Xiaofei Zang, Alexei V. Balakin, Alexander P. Shkurinov, YiMing Zhu   +8 more
doaj   +1 more source

Phase‐Coupling‐Induced Far‐Field Modulation between Nontrivial and Trivial Modes in Cavity–Waveguide Systems

Advanced Photonics Research, 2023
Photonic crystal (PhC) can be accurately designed to generate nontrivial and trivial modes, that is, edge states (ES)/corner states (CS) and cavity modes, respectively. The coupled cavity–waveguide system designed by PhC provides a chip‐scale platform to
Xudong Zhan, Xiaofei Zang, Kun Liu, Jiong Xu, Yiming Zhu, Songlin Zhuang   +5 more
doaj   +1 more source