摘要
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.
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.
作者
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
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(Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;Key Laboratory for Laser Plasmas(MoE)and Department of Physics,Shanghai Jiao Tong University,Shanghai 200240,China;State Key Laboratory of Nuclear Physics and Technology,Institute of Heavy Ion Physics,Peking University,Beijing 100871,China)
基金
supported by National Natural Science Foundation of China(Nos.10925421,10735050,10974250,10935002)
