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Optical Engineering

Terahertz wave absorption via femtosecond laser-filament concatenation
Author(s): Ji Zhao; LiangLiang Zhang; Tong Wu; XiaoYan Xu; CunLin Zhang; YueJin Zhao
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Paper Abstract

Terahertz (THz) emission from laser-induced air plasma is a well known and widely used phenomenon. We report that when two laser beams from the laser creating two plasma filaments interact with each other, THz absorption is observed. We believe that a change in the refractive index of the plasma causes the THz-wave absorption. The following experimental results reveal that the THz absorption becomes more pronounced with increasing pump power and that the gas species surrounding the femtosecond laser filament can also influence the THz absorption rate.

Paper Details

Date Published: 9 April 2015
PDF: 4 pages
Opt. Eng. 54(4) 046104 doi: 10.1117/1.OE.54.4.046104
Published in: Optical Engineering Volume 54, Issue 4
Show Author Affiliations
Ji Zhao, Beijing Institute of Technology (China)
LiangLiang Zhang, Capital Normal Univ. (China)
Tong Wu, Capital Normal Univ. (China)
XiaoYan Xu, Capital Normal Univ. (China)
CunLin Zhang, Capital Normal Univ. (China)
YueJin Zhao, Beijing Institute of Technology (China)

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