空气中直流偏置激光等离子体细丝径向偏振太赫兹辐射的测量与控制。

Measurement and Control of Radially Polarized THz Radiation from DC-Biased Laser Plasma Filaments in Air.

作者信息

Han Bonan, Chen Yanping, Xia Tianhao, Wang Linzheng, Wang Chen, Sheng Zhengming

机构信息

Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.

出版信息

Sensors (Basel). 2022 Jul 13;22(14):5231. doi: 10.3390/s22145231.

DOI:10.3390/s22145231

PMID:35890911

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9322885/

Abstract

Detection and manipulation of radially polarized terahertz (THz) radiation is essential for many applications. A new measurement scheme is proposed for the diagnosis of radially polarized THz radiation from a longitudinal dc-biased plasma filament, by introducing a movable metal mask. The amplitude and spectrum of the radially polarized THz beam was measured with a <110>-cut ZnTe crystal, where the THz beam pattern was modulated by the mask. Based on this measurement scheme, it was demonstrated that the amplitude and spectrum of the radially polarized THz radiation from the longitudinal dc-biased filament could be manipulated by controlling the strength and the location of the dc-biased field.

摘要

对于许多应用而言，径向偏振太赫兹（THz）辐射的检测与操控至关重要。通过引入一个可移动的金属掩膜，提出了一种新的测量方案，用于诊断来自纵向直流偏置等离子体细丝的径向偏振太赫兹辐射。利用一块<110>切割的碲化锌晶体测量了径向偏振太赫兹光束的振幅和光谱，其中太赫兹光束图案由掩膜调制。基于此测量方案，结果表明，通过控制直流偏置场的强度和位置，可以操控来自纵向直流偏置细丝的径向偏振太赫兹辐射的振幅和光谱。