掺镱飞秒脉冲激光激发DAST晶体产生THz谱的可行性研究

华东师范大学学报(自然科学版) ›› 2014, Vol. 2014 ›› Issue (4): 88-93.

掺镱飞秒脉冲激光激发DAST晶体产生THz谱的可行性研究

罗从文, 赵振宇, 闫爱民, 胡志娟, 石旺舟, 陈之战

上海师范大学~物理系, 上海200234

收稿日期:2013-07-01 修回日期:2013-10-01 出版日期:2014-07-25 发布日期:2014-07-25

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

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

摘要/Abstract

摘要： 为了获得与掺镱飞秒脉冲激光匹配的高效太赫兹(THz)发射源,
本文根据相位匹配原理, 并结合DAST晶体多声子共振吸收,
模拟了掺镱飞秒激光脉冲激发DAST晶体后获得的THz频谱.
通过与CdTe、GaP等电光晶体比较后发现: 当三种晶体厚度都为0.1 mm时,
DAST晶体可以获得12 THz带宽的发射频谱, 超过CdTe的3.5 THz和GaP的6.4
THz; 同时, 其最大发射强度超过CdTe和GaP的10倍以上. 因此,
DAST晶体能够成为与掺镱飞秒激光匹配的高效THz发\linebreak 射源.

关键词: 太赫兹波, 掺镱飞秒脉冲激光, 相位匹配, 有机光学晶体

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

中图分类号:

TN209

罗从文, 赵振宇, 闫爱民, 胡志娟, 石旺舟, 陈之战. 掺镱飞秒脉冲激光激发DAST晶体产生THz谱的可行性研究[J]. 华东师范大学学报(自然科学版), 2014, 2014(4): 88-93.

LUO Cong-wen, ZHAO Zhen-yu, YAN Ai-min, HU Zhi-juan, SHI Wang-zhou, CHEN Zhi-zhan. Feasibility of THz generation from DAST crystal excited by Yb-doped femtosecond laser[J]. Journal of East China Normal University(Natural Sc, 2014, 2014(4): 88-93.

参考文献

{[1]} JUKAM N, DHILLON S, ZHAO Z Y, et al. Gain measurements of THz quantum cascade lasers using THz time-domain spectroscopy [J]. IEEE Journal of Selected Topics In Quantum Electronics, 2008, 14(1): 436-442.
{[2]} LUONG T Q, VERMA P K, MITRA R K, et al. Do hydration dynamics follow the structural perturbation during thermal denaturation of a protein: a terahertz absorption study [J]. Biophysical Journal, 2011, 101: 925-933.
{[3]} RUTZ F, KOCH M, KHARE S, et al. Terahertz quality control of polymeric products [J]. International Journal of Infrared and Millimeter Waves, 2006, 27(4): 547-556.
{[4]} CHANG G Q, DIVIN C J, YANG J, et al. GaP waveguide emitters for high power broadband THz generation pumped by Yb-doped fiber laser [J]. Optics Express, 2007, 15(25): 16308-16315.
{[5]} SCHALL M, WALTHER M, JEPSEN P U. Fundamental and second-order phonon processes in CdTe and ZnTe [J]. Physical Review B, 2010, 64(9): 094301-094308.
{[6]} YABUZAKI J, TAKAHASHI Y, ADACHI H, et al. High-quality crystal growth and characterization of organic nonlinear optical crystal: 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) [J]. Bulletin of Materials Science, 1999, 22(1): 11-13.
{[7]} KATAYAMA I, AKAI R, BITO M, et al. Ultra-broadband terahertz generation using 4-N,N-dimethylamino-4-N-methyl-stilbazolium tosylate single crystals [J]. Applied Physics Letters, 2010, 97(1): 021105-021107.
{[8]} SUIZU K, SHIBUYA T, UCHIDA H, et al. Prism-coupled Cherenkov phase-matched terahertz wave generation using a DAST crystal [J]. Optics Express, 2010, 18(4): 3338-3344.
{[9]} CUNNINGHAM P, HAYDEN M. Optical properties of DAST in the THz range [J]. Optics Express, 2010, 18(23): 23620-23625.
{[10]} KLENNER A, GOLLING M, KELLER U. A gigahertz multimode-diode-pumped Yb: KGW enable a strong frequency comb offset beat signal [J]. Optics Express, 2013, 21(8): 10351-10357.
{[11]} PRADARUTTI B, MATTHAUS G, RIEHEMANN S, et al. Highly efficient terahertz electro-optic sampling by material [J]. Optics Communications, 2008, 281: 5031-5035.
{[12]} JAZBINSEK M, MUTTER L, G\"{U}NTER P. Photonic applications with the organic nonlinear optical crystal DAST [J]. IEEE Journal of Selected Topics In Quantum Electronics, 2008, 14(5): 1298-1310.
{[13]} SCHNEIDER A, NEIS M, STILLHART M, et al. Generation of terahertz pulse through optical rectification in organic DAST crystals: theory and experiment [J]. Journal of the Optical Society of America B, 2006, 23(9): 1822-1834.
{[14]} PA\check{\rm C}BUTASV, BI\check{\rm C}I\bar{\rm U}AS A, BALAKAUSKAS S, et al. Terahertz time-domain-spectroscopy system based on femtosecond Yb:fiber laser and GaBiAs photoconducting components [J]. Applied Physics Letters, 2010, 93(3): 031111-031113.