| 强激光和超薄等离子体薄膜相互作用产生高次谐波 |
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| 引用本文： | 帅斌,沈百飞,李儒新,徐至展. 强激光和超薄等离子体薄膜相互作用产生高次谐波[J]. 光学学报, 2002, 22(10): 153-1158 |
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| 作者姓名： | 帅斌 沈百飞 李儒新 徐至展 |
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| 作者单位： | 中国科学院上海光学精密机械研究所强光光学开放实验室,上海,201800;中国科学院上海光学精密机械研究所强光光学开放实验室,上海,201800;中国科学院上海光学精密机械研究所强光光学开放实验室,上海,201800;中国科学院上海光学精密机械研究所强光光学开放实验室,上海,201800 |
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| 基金项目： | 国家自然科学基金(19974 058),国家杰出青年科学基金(6 992553),上海应用物理中心资助(99JC14006),国家重点基础研究发展规划项目(G1999075200),国家863项目,中国科学院百人计划项目,引进国外杰出人才项目资助课题 |
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| 摘 要： | 通过一维粒子（particle in cell,简称PIC）模拟,研制了超薄等离子体薄膜在两列旋转方向相反的圆偏振激光脉冲作用下的高次谐波辐射。在10^21W/cm^2强度的激光作用下,可以获得200次以上的高次谐波。当激光脉冲宽度较短时,由于等离子体薄膜被压缩所导致的多普勒频移对高次谐波产生了显著的频率调制。而这种多普勒频移可以通过对抽运光脉冲引入频率啁啾来补偿。
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| 关 键 词： | 高次谐波 等离子体薄膜 粒子模拟 |
| 收稿时间： | 2001-10-26 |
High Order Harmonic Generation in Ultra Thin Plasma Foil |
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| Shuai Bin Shen Baifei Li Ruxin Xu Zhizhan. High Order Harmonic Generation in Ultra Thin Plasma Foil[J]. Acta Optica Sinica, 2002, 22(10): 153-1158 |
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| Authors: | Shuai Bin Shen Baifei Li Ruxin Xu Zhizhan |
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| Abstract: | The high order harmonic emission from thin plasma foils irradiated by two circular polarized, counter propagating laser pulses with their electrical vectors rotating in different direction was investigated via 1|D particle in cell (PIC) simulations, More than 200 harmonics can be generated with the laser intensity of 10 21 W/cm 2. When the duration of laser gets shorter, the frequencies of harmonics were severely modulated due to the Doppler shift caused by the movement of the plasma boundary when the foil is being compressed. The Doppler shift can be estimated by the simulation results, and this effect can also be reduced or modified by introducing frequency chirping to the pump pulse. |
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| Keywords: | high order harmonic plasma foil particle in cell simulation |
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