| 掺镱飞秒脉冲激光激发DAST晶体产生THz谱的可行性研究 |
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| 引用本文： | 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. |
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| 作者姓名： | 罗从文 赵振宇 闫爱民 胡志娟 石旺舟 陈之战 |
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| 作者单位： | 上海师范大学~物理系, 上海200234 |
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| 基金项目： | 国家的科学基金(61307130);上海师范大学创兴团队(DXL121);国家重点基础研究项目(2012CB326402);上海市教育委员会创新项目(14YZ077) |
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| 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0.1mm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发射源.
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| 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 |
| 收稿时间： | 2013-07-01 |
Feasibility of THz generation from DAST crystal excited by Yb-doped femtosecond laser |
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| 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 Science),2014,2014(4):88-93. |
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| Authors: | LUO Cong-wen ZHAO Zhen-yu YAN Ai-min HU Zhi-juan SHI Wang-zhou CHEN Zhi-zhan |
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| Institution: | Department of Physics, Shanghai Normal University, Shanghai 200234, China |
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| 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. |
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