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

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

doi:10.3390/s22145231

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

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

Authors

Bonan Han^{1

2}, Yanping Chen^{1

2}, Tianhao Xia^{1

2}, Linzheng Wang^{1

2}, Chen Wang^{1

2}, Zhengming Sheng^{1

2

3}

Affiliations

¹ Key Laboratory for Laser Plasmas (Ministry of Education), School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
² Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China.
³ Tsung-Dao Lee Institute, Shanghai Jiao Tong University, Shanghai 200240, China.

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.

Keywords: laser plasmas; longitudinal dc-biased electric field; radial polarization; terahertz radiation.

Abstract

Grants and funding