Results 131 to 140 of about 11,658 (306)

Interferometric Terahertz Wavefront Analysis

, 2017
International audienceWavefront characterization of terahertz beams is useful for various applications such as terahertz spectroscopy and imaging. In this paper, we report on the aberration measurement of a terahertz beam issued from a quantum cascade ...
Ogawa, Takayuki, Abraham, Emmanuel, Yasui, Takeshi, Brossard, Mathilde   +3 more
core   +1 more source

Ultrafast Dynamics of Spin Current and Electron Temperature in Spintronic Terahertz Emitters

Advanced Science, EarlyView.
This work quantifies optical‐pump‐induced THz transmission variations to reveal electron and lattice temperature dynamics and presents time‐resolved THz spectral maps for sub‐picosecond analysis. A 63 ± 8 fs time lag between THz emission and laser excitation is identified, serving as an intrinsic parameter limiting the upper frequency of spintronic THz
Yifan Wang, Zuanming Jin, Miao Cai, Zhiqiang Lan, Zhenjie Ge, Zheng Feng, Wei Tan, Alexei V. Balakin, Alexander P. Shkurinov, Yan Peng, Yiming Zhu   +10 more
wiley   +1 more source

Biomedical application of terahertz imaging technology: a narrative review. [PDF]

Quant Imaging Med Surg, 2023
Cong M, Li W, Liu Y, Bi J, Wang X, Yang X, Zhang Z, Zhang X, Zhao YN, Zhao R, Qiu J.   +10 more
europepmc   +1 more source

Imaging through a scanner, darkly: spectral imaging for sentinel lymph node biopsies

, 2012
Breast cancer is the single most prevalent form of cancer in the UK today, accounting for around 16% of all diagnoses, and around 31% of diagnoses in women. The survival rates are good.
O'Sullivan, Jack D., O'Sullivan, Jack Denis   +1 more
core  

Terahertz Digital Holographic Imaging of Voids Within Visibly Opaque Dielectrics

, 2014
Terahertz digital off-axis holography (THzDH) has been demonstrated as a non-destructive tool for imaging voids within visually opaque dielectrics. Using a raster scanning heterodyne detector, the imager captures lensless transmission holograms formed by
Ng, WR, Heimbeck, MS, Gehm, ME, Everitt, HO, Golish, DR   +4 more
core   +1 more source

Photonic‐Enabled Energy‐Efficient Transparent Neuromorphic Computing Devices: A Review

Advanced Science, EarlyView.
Transparent photonic neuromorphic computing devices merge optics and brain‐inspired computing to overcome von Neumann bottlenecks with ultrafast, low‐energy processing. By exploiting transparent oxides, 2D materials, phase‐change materials, and hybrid heterostructures, these platforms enable photonic synapses, memory, and logic for see‐through edge ...
Shuvaraj Ghosh, Ki‐bum Lee, Junghyeon Lee, Seunghee Cho, Malkeshkumar Patel, Hangfei Li, Yu Wen, Ye Zhou, Joondong Kim   +8 more
wiley   +1 more source

Terahertz Spectroscopy and Imaging [PDF]

, 2013
Transmission, reflection, refraction and scattering of Terahertz radiation.- Optical constants and dispersion relations in THz spectroscopy.- Scattering effects.- Converging Terahertz beam vs. plane wave.- Signal Processing - Wavelet Transform.- Signal Processing - Fractional Fourier transformation and spectrogram in signal processing of Terahertz ...
openaire   +1 more source

Millimetre wave imaging for concealed target detection

, 2011
PhDConcealed weapon detection (CWD) has been a hot topic as the concern about pub- lic safety increases. A variety of approaches for the detection of concealed objects on the human body based on earth magnetic ¯eld distortion, inductive magnetic ¯eld,
Zhang, Lianhong
core  

Large Temperature‐invariant Anomalous Nernst Effect in Non‐collinear Antiferromagnet Mn3Pt

Advanced Science, EarlyView.
Based on the noncollinear antiferromagnetic Mn3Pt thin films, the composition‐tunable Mn‐3d orbital states directly govern the Berry curvature. As a result, a giant and temperature‐invariant anomalous Nernst coefficient of 0.71 µV/K is achieved under Mn‐rich conditions.
Pengwei Gong, Xiaolin Zhang, Wei Zhu, Mingzhi Wang, Chang Pan, Aoqi Xu, Yandong Guo, Yuheng Li, Jiaxin Chen, Yanchang Zhou, Zhong Shi, Dingfu Shao, Liang Liu, Shiming Zhou, Yicheng Guan, Ruiqing Cheng, Xuepeng Qiu   +16 more
wiley   +1 more source

A multi-scale spatial-frequency double branch network for terahertz ISAR image target classification

Defence Technology
Inverse synthetic aperture radar (ISAR), as the core technology of high-resolution radar imaging, has significant application value in fields of marine monitoring, air reconnaissance and space target recognition due to its all-weather and long-range ...
Qiuyan Wang, Wanting Chen, Yinwei Li, Jixiang Fu, Hongqiang Wang, Yiming Zhu, Mengdao Xing   +6 more
doaj   +1 more source