| Red Shift and Broadening of Backward Harmonic Radiation from Electron Oscillations Driven by Femtosecond Laser Pulse |
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| 作者姓名： | 田友伟 余玮 陆培祥 Vinod K.SENECHA 徐涵 邓德刚 李儒新 徐至展 |
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| 作者单位： | [1]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Opticsand Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China [2]State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China [3]Centre for Advanced Technology, Indore-452 013, India |
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| 基金项目： | supported by the National High-Tech ICF Committee of China （No. 10335020/A0506）, National Natural Science Foundation of China （Nos. 10474081 and 10576035） and Shanghai Natural Science Foundation （No. 05ZR14159）. |
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| 摘 要： | The characteristics of backward harmonic radiation due to electron oscillations driven by a linearly polarized fs laser pulse are analysed considering a single electron model. The spectral distributions of the electron＇s backward harmonic radiation are investigated in detail for different parameters of the driver laser pulse. Higher order harmonic radiations are possible for a sufficiently intense driving laser pulse. We have shown that for a realistic pulsed photon beam, the spectrum of the radiation is red shifted as well as broadened because of changes in the longitudinal velocity of the electrons during the laser pulse. These effects are more pronounced at higher laser intensities giving rise to higher order harmonics that eventually leads to a continuous spectrum. Numerical simulations have further shown that by increasing the laser pulse width the broadening of the high harmonic radiations can be controlled.
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| 关 键 词： | 飞秒激光脉冲 电子振动装置 谐波辐射 红移 谐波发生器 |
| 收稿时间： | 2005-08-22 |
| 修稿时间： | 2005-08-22 |
Red Shift and Broadening of Backward Harmonic Radiation from Electron Oscillations Driven by Femtosecond Laser Pulse |
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| TIAN Youwei, YU Wei, LU Peixiang, Vinod K. SENECHA, XU Han, DENG Degang, LI Ruxin, XU Zhizhan.Red Shift and Broadening of Backward Harmonic Radiation from Electron Oscillations Driven by Femtosecond Laser Pulse[J].Plasma Science & Technology,2006,8(4):402-405. |
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| Authors: | TIAN Youwei YU Wei LU Peixiang Vinod K SENECHA XU Han DENG Degang LI Ruxin XU Zhizhan |
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| Affiliation: | 1 State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China 2 State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China 3 Centre for Advanced Technology, Indore- 452 013, India |
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| Abstract: | |
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| Keywords: | harmonic emission broaden red shift femtosecond laser |
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