@inproceedings{fb30a7021f9f4fbcb56fe19fa30cd295,
title = "External electric field control of terahertz radiation from laser-induced air plasma",
abstract = "We report that the intensity of the terahertz pulse is significantly enhanced by placing the femtosecond laser induced air plasma into a high-voltage DC electric field, which is generated by two parallel metal electrode plates. We experimentally demonstrate that the intensity of the terahertz pulse enhances linearly with the increase of the external electric field magnitude. We also find that the width of the effective spectrum decreases as the bias voltage increases, and the center frequency shifts to the low frequency. Furthermore, we find an optimal solution for applying the external electric field by changing the angle of the two parallel metal electrode plates. We speculate that the above phenomenon is mainly due to the plasma current generating terahertz and the bias electric field can drive the current in the plasma to enhance the terahertz signal.",
keywords = "Air plasma, External electric field, High-voltage, Terahertz",
author = "Shijia Feng and Aoxue Yu and Liangliang Zhang and Yuejin Zhao and Liquan Dong",
note = "Publisher Copyright: {\textcopyright} COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.; Terahertz Emitters, Receivers, and Applications X 2019 ; Conference date: 11-08-2019 Through 13-08-2019",
year = "2019",
doi = "10.1117/12.2526689",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Manijeh Razeghi and Baranov, \{Alexei N.\} and Vitiello, \{Miriam S.\}",
booktitle = "Terahertz Emitters, Receivers, and Applications X",
address = "United States",
}