Chinese Optics Letters, 2017, 15 (8): 081902, Published Online: Jul. 20, 2018  

Influence of laser contrast on high-order harmonic generation from solid-density plasma surfaces Download: 1099次

Author Affiliations
1 Key Laboratory for Laser Plasmas (Ministry of Education) and Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China
2 Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
3 State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China
4 College of Science, National University of Defense Technology, Changsha 410073, China
5 SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK
Abstract
The influence of laser temporal contrast on high-order harmonic generation from intense laser interactions with solid-density plasma surfaces is experimentally studied. A switchable plasma mirror system is set up to improve the contrast by two orders of magnitude at 10 ps prior to the main peak. By using the plasma mirror and tuning the prepulse, the dependence of high-order harmonic generation on laser contrast is investigated. Harmonics up to the 21st order via the mechanism of coherent wake emission are observed only when the targets are irradiated by high contrast laser pulses by applying the plasma mirror.

Jian Gao, Feng Liu, Xulei Ge, Yanqing Deng, Guobo Zhang, Yuan Fang, Wenqing Wei, Su Yang, Xiaohui Yuan, Min Chen, Zhengming Sheng, Jie Zhang. Influence of laser contrast on high-order harmonic generation from solid-density plasma surfaces[J]. Chinese Optics Letters, 2017, 15(8): 081902.

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