| Relaxation of Dense Electron Plasma Induced by Femtosecond Laser in Dielectric Materials |
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| 作者姓名： | 孙泉 蒋红兵 刘一 周永恒 杨宏 龚旗煌 |
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| 作者单位： | State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 |
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| 基金项目： | Supported by the National Key Basic Research Special Foundation （NKBRSF） of China under Grant No TG1999075207, the National Natural Science Foundation of China under Grant Nos 10104003, 90101027, and 10574006. |
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| 摘 要： | Electron plasma induced by a focused femtosecond pulse （130 fs, 800 nm） in dielectric materials （Soda Lime glass, K9 glass, and SiO2 crystal） is investigated by pump-probe shadow imaging technology. The relaxation of the electron plasma in the conduction band is discussed. In SiO2 crystals, a fast self-trapping process with a trapping time of 150fs is observed, which is similar to that in fused silica. However, in Soda Lime glass and K9 glass, no self-trapping occurs, and two decay processes are found： one is the energy relaxation process of conduction electrons within several picoseconds, another is an electron-hole recombination process with a timescale of lOOps. The electron collision time T in the conduction band is also measured to be in the order of 1 fs in all of these materials.
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| 关 键 词： | 松弛法 密集电子等离子体 飞秒激光器 电介质材料 |
| 收稿时间： | 2005-08-31 |
| 修稿时间： | 2005-08-31 |
Relaxation of Dense Electron Plasma Induced by Femtosecond Laser in Dielectric Materials |
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| SUN Quan, JIANG Hong-Bmg, LIU Yi, ZHOU Yong-Heng, YANG nong, GONG Qi-nuang.Relaxation of Dense Electron Plasma Induced by Femtosecond Laser in Dielectric Materials[J].Chinese Physics Letters,2006,23(1):189-192. |
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| Authors: | SUN Quan JIANG Hong-Bmg LIU Yi ZHOU Yong-Heng YANG nong GONG Qi-nuang |
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