Terahertz wave absorption via femtosecond laser-filament concatenation

Ji Zhao; LiangLiang Zhang; Tong Wu; XiaoYan Xu; CunLin Zhang; YueJin Zhao

doi:10.1117/1.OE.54.4.046104

9 April 2015 Terahertz wave absorption via femtosecond laser-filament concatenation

Ji Zhao, LiangLiang Zhang, Tong Wu, XiaoYan Xu, CunLin Zhang, YueJin Zhao

Author Affiliations +

Optical Engineering, Vol. 54, Issue 4, 046104 (April 2015). https://doi.org/10.1117/1.OE.54.4.046104

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.

Citation Download Citation

Ji Zhao, LiangLiang Zhang, Tong Wu, XiaoYan Xu, CunLin Zhang, and YueJin Zhao "Terahertz wave absorption via femtosecond laser-filament concatenation," Optical Engineering 54(4), 046104 (9 April 2015). https://doi.org/10.1117/1.OE.54.4.046104

Published: 9 April 2015

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