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허민섭

Hur, Min Sup
Computational Plasma Lab.
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Relativistic terahertz pulse generation by non-linear interaction of a high-power fs laser with underdense plasmas

Author(s)
Kim, J. J.Jang, D. G.Hur, Min SupJang, H.Suk, H.
Issued Date
2012-10
DOI
10.1088/0022-3727/45/39/395201
URI
https://scholarworks.unist.ac.kr/handle/201301/3795
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84866425515
Citation
JOURNAL OF PHYSICS D-APPLIED PHYSICS, v.45, no.39, pp.1 - 5
Abstract
Generation of a terahertz radiation by the interaction of a highly intense laser (I-L >= 10(18) W cm(-2)) and an underdense plasma with relativistic effects has been investigated. The results of two-dimensional particle-in-cell simulations for the relativistic frequency shift of the emitted THz pulse are presented. It was found that the emitted THz frequency is shifted down with the scaling of gamma(-alpha), where gamma is the Lorentz factor of the driving laser pulse and a is roughly 0.2 and slightly depends on the laser spot size. Furthermore, the monotonic linear dependence of the THz field strength on the incident laser power was observed. Comparison of the non-relativistic and relativistic laser power regime is shown as well.
Publisher
IOP PUBLISHING LTD
ISSN
0022-3727
Keyword
RADIATIONEMISSION

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