1 中国工程物理研究院 a.微系统与太赫兹研究中心，四川成都 610200
2 b.电子工程研究所，四川绵阳 621999
3 哈尔滨工业大学物理系，黑龙江哈尔滨 150000
采用单温模型，利用有限元方法对硅在纳秒脉冲激光作用下的温度积累效应进行了数值模拟。给出了单脉冲、多脉冲作用下，硅表面附近的非平衡载流子浓度、自由载流子吸收系数和晶格温度随时间的变化规律。结果表明，自由载流子浓度的积累是温度积累的主要来源。对于多脉冲作用情况，脉冲间隔越短，脉宽越窄，温度积累效应越明显，最终形成的瞬时晶格最高温和温升值越大，越容易对材料造成损伤。
激光脉冲 温度积累效应 晶格温度 重复频率 损伤阈值 脉宽 laser pulse accumulative photo-thermal effect lattice temperature repetition rate damage threshold pulse width 太赫兹科学与电子信息学报
2018, 16(1): 158
Author Affiliations
Abstract
1 College of Physics, Jilin University, Changchun 130023
2 Key Laboratory of Coherent Light, Atomic and Molecular Spectroscopy, Ministry of Education of China, Jilin University, Changchun 130023
Through the reversible isomerization of trans-cis-trans under the linear polarization light, the molecules of azo materials have the same tropism which is vertical to the polarization of light. This means that azo materials have photo-induced birefringence which is related to optical power and polarization angle of the light. Based on the photo-induced birefringence of azo materials, we design a new type of optically pumped semiconductor vertical external cavity surface emitting laser (OPS-VECSEL) which can control the polarization and frequency of the ejection laser. The functional molecules of azo materials are [3-azo-(4'nitro)]-(9-ethyl)-carbazole (ANECz).
光泵浦半导体外腔垂直激光器(OPS-VECSEL) 4-硝基-3-偶氮-9-乙基-咔唑(ANECz) 光致双折射 140.3580 Lasers, solid-state 140.3600 Lasers, tunable 140.5960 Semiconductor lasers Chinese Optics Letters
2008, 6(11): 855
