Journal of East China Normal University(Natural Sc ›› 2014, Vol. 2014 ›› Issue (4): 88-93.

• Article • Previous Articles     Next Articles

Feasibility of THz generation from DAST crystal excited by Yb-doped femtosecond laser

LUO Cong-wen, ZHAO Zhen-yu, YAN Ai-min, HU Zhi-juan, SHI Wang-zhou, CHEN Zhi-zhan   

  1. Department of Physics, Shanghai Normal University, Shanghai 200234, China
  • Received:2013-07-01 Revised:2013-10-01 Online:2014-07-25 Published:2014-07-25

Abstract: We investigate the feasibility to generate broadband THz
efficiently from the DAST crystal excited by anYttrium-doped
femtosecond pulse laser. Taking account of the phase matching
condition and the impact of THz absorption, we simulated the THz
emission spectra of DAST, CdTe as well as GaP crystals excited at
1.03 $\mu $m. Given a fixed thickness of 0.1 mm, the DAST achieves
12 THz bandwidth, much larger than CdTe (3.5 THz) and GaP (6.4 THz).
Furthermore, the maximum emission amplitude of DAST exceed beyond 10
times of magnitude to CdTe or GaP crystals. Therefore, DAST crystal
is proposed to be an efficient THz emitter adapt for Yttrium-doped
femtosecond pulse lasers.

Key words: Terahertz, ytterbium-doped femtosecond pulse, phase matching condition, organic optical crystal

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