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Keywords = longitudinal dc-biased electric field

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11 pages, 3645 KiB  
Article
Measurement and Control of Radially Polarized THz Radiation from DC-Biased Laser Plasma Filaments in Air
by Bonan Han, Yanping Chen, Tianhao Xia, Linzheng Wang, Chen Wang and Zhengming Sheng
Sensors 2022, 22(14), 5231; https://doi.org/10.3390/s22145231 - 13 Jul 2022
Cited by 2 | Viewed by 2142
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Sensing with Femtosecond Laser Filamentation)
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