外文题目: Waveform control of enhanced THz radiation from femtosecond laser filament in air
作者: Wang, Tie-Jun; Ju, Jingjing; Liu, Yaoxiang; Li, Ruxin; Xu, Zhizhan; Chin, See Leang
刊名: Appl. Phys. Lett.
年: 2017 卷: 110 期: 22 文章编号：221102
英文关键词:

GENERATION
英文摘要:
We report on a waveform control of enhanced THz radiation along a femtosecond laser filament in air with a high voltage technique. By applying a DC high-voltage electric field from two sharp electrodes in a direction parallel to the laser filament and scanning it along the filament, the longitudinal evolution of amplified THz emission was demonstrated. By changing the position of the pair of electrodes along the laser filament, different waveforms of THz radiation were obtained. Due to the change of the plasma density distribution at the leading and trailing ends of a laser filament, the enhanced THz waveforms could have a phase shift of similar to pi. The technique is very simple. It could help to understand the THz generation process through external electric field assisted laser filamentation. Published by AIP Publishing.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1063/1.4984599


全文传递服务