High-intensity femtosecond laser absorption by rare-gas clusters

doi:10.1088/1009-1963/12/11/308

中国物理B ›› 2003, Vol. 12 ›› Issue (11): 1229-1234.doi: 10.1088/1009-1963/12/11/308

High-intensity femtosecond laser absorption by rare-gas clusters

王成¹, 刘建胜¹, 王向欣¹, 朱频频¹, 李儒新¹, 倪国权¹, 徐至展¹, 李邵辉²

(1)Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; (2)Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; Department of Physics, Shantou University, Shantou 515063, China

收稿日期:2003-06-17 修回日期:2003-07-15 出版日期:2003-11-16 发布日期:2005-03-16
基金资助:
Project supported by the National Basic Research Special Foundation (Grant No G1999075200), the National Natural Science Foundation of China (Grant No 29890210) and Shanghai Foundation of Science & Technology (Grant No 0159nm022).

High-intensity femtosecond laser absorption by rare-gas clusters

Li Shao-Hui (李邵辉)^ab, Wang Cheng (王成)^a, Liu Jian-Sheng (刘建胜)^a, Wang Xiang-Xin (王向欣)^a, Zhu Pin-Pin (朱频频)^a, Li Ru-Xin (李儒新)^a, Ni Guo-Quan (倪国权)^a, Xu Zhi-Zhan (徐至展)^a

^a Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; ^b Department of Physics, Shantou University, Shantou 515063, China

Received:2003-06-17 Revised:2003-07-15 Online:2003-11-16 Published:2005-03-16
Supported by:
Project supported by the National Basic Research Special Foundation (Grant No G1999075200), the National Natural Science Foundation of China (Grant No 29890210) and Shanghai Foundation of Science & Technology (Grant No 0159nm022).

摘要/Abstract

摘要： The energy absorption efficiency of high-intensity (～10^{16}W/cm^2) femtosecond laser pulses in a dense jet of large rare-gas clusters has been measured. Experimental results show that the energy absorption efficiency is strongly dependent on the cluster size and can be higher than 90%. The measurement of the ion energy indicates that the average ion energies of argon and xenon can be as high as 90 and 100keV, respectively. The dependence of the average energy of the ions on the cluster size is also measured. At comparatively low gas backing pressure, the average ion energies of argon and xenon increase with increasing gas backing pressure. The average ion energy of argon becomes saturated gradually with further increase of the gas backing pressure. For xenon, the average ion energy drops a little after the gas backing pressure exceeds 9 bar (3.2×10^5 atoms/cluster). The result showing the existence of a maximum average ion energy has been interpreted within the framework of the microplasma sphere model.

Abstract: The energy absorption efficiency of high-intensity ($\sim10^{16}$W/cm^2) femtosecond laser pulses in a dense jet of large rare-gas clusters has been measured. Experimental results show that the energy absorption efficiency is strongly dependent on the cluster size and can be higher than 90%. The measurement of the ion energy indicates that the average ion energies of argon and xenon can be as high as 90 and 100keV, respectively. The dependence of the average energy of the ions on the cluster size is also measured. At comparatively low gas backing pressure, the average ion energies of argon and xenon increase with increasing gas backing pressure. The average ion energy of argon becomes saturated gradually with further increase of the gas backing pressure. For xenon, the average ion energy drops a little after the gas backing pressure exceeds 9 bar ($3.2\times 10^5$ atoms/cluster). The result showing the existence of a maximum average ion energy has been interpreted within the framework of the microplasma sphere model.

Key words: atomic clusters, femtosecond intense laser pulse, high-energy ions

中图分类号: (Atomic and molecular clusters)

36.40.-c

33.80.-b (Photon interactions with molecules) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)

李邵辉, 王成, 刘建胜, 王向欣, 朱频频, 李儒新, 倪国权, 徐至展. High-intensity femtosecond laser absorption by rare-gas clusters[J]. 中国物理B, 2003, 12(11): 1229-1234.

Li Shao-Hui (李邵辉), Wang Cheng (王成), Liu Jian-Sheng (刘建胜), Wang Xiang-Xin (王向欣), Zhu Pin-Pin (朱频频), Li Ru-Xin (李儒新), Ni Guo-Quan (倪国权), Xu Zhi-Zhan (徐至展). High-intensity femtosecond laser absorption by rare-gas clusters[J]. Chinese Physics, 2003, 12(11): 1229-1234.

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High-intensity femtosecond laser absorption by rare-gas clusters

High-intensity femtosecond laser absorption by rare-gas clusters

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