| 脉冲强激光破坏Hg0.8Cd0.2Te晶片材料的机理分析 |
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| 引用本文： | 蔡虎,程祖海,朱海红,左都罗.脉冲强激光破坏Hg0.8Cd0.2Te晶片材料的机理分析[J].强激光与粒子束,2006,18(6):927-930. |
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| 作者姓名： | 蔡虎 程祖海 朱海红 左都罗 |
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| 作者单位： | 华中科技大学 激光技术国家重点实验室, 武汉 430074 |
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| 基金项目： | 国家973计划项目资助课题 |
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| 摘 要： | 利用光学金相显微镜对TEA-CO2脉冲强激光辐照的Hg0.8Cd0.2Te晶片表面进行了观察。在单脉冲能量为37.5 J，能量密度为937.5 J/cm2的强激光辐照下，晶片表面呈现出熔融迹象和大量的微裂纹，微裂纹密度从激光辐照区中心向外逐渐减少，裂纹沿晶体的(111)面扩展。随着脉冲连续作用次数的增加，晶片表面熔融更加剧烈，裂纹数目、裂纹深度和宽度都有所增加。分析认为：HgCdTe晶片的破坏与激光辐照能量、脉冲连续作用次数、激光场强分布、激光热应力、激光支持的燃烧波和物质的蒸发波等冲击波有关。
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| 关 键 词： | TEA-CO2脉冲激光 HgCdTe 裂纹 破坏机理 |
| 文章编号： | 1001-4322(2006)06-0927-04 |
| 收稿时间： | 2005-02-03 |
| 修稿时间： | 2005-09-05 |
Destruction mechanism of Hg0.8Cd0.2Te induced by high power pulsed TEA-CO2 laser |
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| CAI Hu,CHENG Zu-hai,ZHU Hai-hong,ZUO Du-luo.Destruction mechanism of Hg0.8Cd0.2Te induced by high power pulsed TEA-CO2 laser[J].High Power Laser and Particle Beams,2006,18(6):927-930. |
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| Authors: | CAI Hu CHENG Zu-hai ZHU Hai-hong ZUO Du-luo |
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| Affiliation: | State Key Laboratory of Laser Technology, Huazhong University of Science and Technology,Wuhan 430074, China |
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| Abstract: | The surfaces of HgCdTe plates irradiated by one pulse of TEA-CO_2 laser with 37.5 J and energy density of 937.5 J/cm~2 are examined by an optical microscope.After laser irradiation,there are large numbers of cracks and much trace of melting in the surface of the plate,and the cracks extending in(111) are the densest in laser irradiation zone.With the increase of the action number of laser pulses at repetition rate of 1 Hz,the melting is more serious,and the numbers,depth and breadth of cracks are all increased.Analyses show the destruction of HgCdTe plates is related with laser energy,action number of laser pulses at repetition rate of 1 Hz,laser field intensity,thermal stress,laser supported combustion wave and evaporation wave. |
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| Keywords: | TEA-CO_2 pulse laser HgCdTe Crack Destruction mechanism |
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