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Spectral control of terahertz radiation from inhomogeneous plasma filaments by tailoring two-color laser beams
Sheng, Wang1; Tang, Fu1; Zhang, Zhelin2,3; Chen, Yanping3; Peng, Xiao-Yu1; Sheng, Zheng-Ming2,3,4
2021-03-15
摘要Terahertz (THz) radiation from an inhomogeneous plasma filament generated by focusing two-color femtosecond laser pulses into argon gas filled in a chamber is investigated experimentally by tailoring the Gaussian pump laser beams with an iris, where broadband THz emission over 10 THz is produced. It is found that the collected far-field THz radiation includes not only coherent but also partial-coherent components of the THz waves, which are emitted from the different parts of the inhomogeneous plasma filament with different plasma densities, contributing correspondingly to the different frequencies of the THz spectrum. Our results suggest that the THz spectrum can be manipulated by controlling the plasma density distribution of the filaments. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
DOI10.1364/OE.417515
发表期刊OPTICS EXPRESS
ISSN1094-4087
卷号29期号:6页码:8676-8684
通讯作者Peng, Xiao-Yu(xypeng@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000629298900059
语种英语