Transmission Degradation of Femtosecond Laser Pulses in Opened Cone Targets

Irradiated by femtosecond laser pulses with different energies, opened cone targets behave very differently in the transmission of incident laser pulses. The targets, each with an opening angle of 71° and an opening of 5 μm, are fabricated using standard semiconductor technology. When the incident l...

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Published inPlasma science & technology Vol. 14; no. 1; pp. 24 - 27
Main Author 刘峰 林晓宣 刘必成 丁文君 杜飞 李玉同 马景龙 刘晓龙 盛政明 陈黎明 鲁欣 董全力 王伟民 王兆华 魏志义 陈佳洱 张杰
Format Journal Article
LanguageEnglish
Published 2012
Subjects
光学装置
半导体技术
开业
激光传输
激光能量
等离子体产生
降解
飞秒激光脉冲
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ISSN1009-0630
DOI10.1088/1009-0630/14/1/06

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Summary:Irradiated by femtosecond laser pulses with different energies, opened cone targets behave very differently in the transmission of incident laser pulses. The targets, each with an opening angle of 71° and an opening of 5 μm, are fabricated using standard semiconductor technology. When the incident laser energy is low and no pre-plasma is generated on the side walls of the cones, the cone target acts like an optical device to reflect the laser pulse, and 15% of the laser energy can be transmitted through the cones. In contrast, when the incident laser energy is high enough to generate pre-plasmas by the pre-pulse of the main pulse that fills the inner cone, the cone with the plasmas will block the transmission of the laser, which leads to a decrease in laser transmission compared with the low-energy case with no plasma. Simulation results using optical software in the low-energy case, and using the particle-in-cell code in the high-energy case, are primarily in agreement with the experimental results.
Bibliography:Irradiated by femtosecond laser pulses with different energies, opened cone targets behave very differently in the transmission of incident laser pulses. The targets, each with an opening angle of 71° and an opening of 5 μm, are fabricated using standard semiconductor technology. When the incident laser energy is low and no pre-plasma is generated on the side walls of the cones, the cone target acts like an optical device to reflect the laser pulse, and 15% of the laser energy can be transmitted through the cones. In contrast, when the incident laser energy is high enough to generate pre-plasmas by the pre-pulse of the main pulse that fills the inner cone, the cone with the plasmas will block the transmission of the laser, which leads to a decrease in laser transmission compared with the low-energy case with no plasma. Simulation results using optical software in the low-energy case, and using the particle-in-cell code in the high-energy case, are primarily in agreement with the experimental results.
LIU Feng , LIN Xiaoxuan, LIU Bicheng , DING Wenjun , DU Fei , LI Yutong , MA Jinglong, LIU Xiaolong, SHENG Zhengming , CHEN Liming , LU Xin , DONG Quanli , WANG Weimin , WANG Zhaohua, WEI Zhiyi , CHEN Jiaer, ZHANG Jie （1.Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China 2Key Laboratory for Laser Plasmas （MoE） and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China 3State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beijing 100871, China）
34-1187/TL
femtosecond laser pulse, cone target, transmission ratio
ISSN:1009-0630
DOI:10.1088/1009-0630/14/1/06