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Title: Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses

Abstract

Interactions of 100-fs laser pulses with solid targets at intensities of 10{sup 18} W/cm{sup 2} and resultant terahertz (THz) radiation are studied under different laser contrast ratio conditions. THz emission is measured in the specular reflection direction, which appears to decrease as the laser contrast ratio varies from 10{sup -8} to 10{sup -6}. Correspondingly, the frequency spectra of the reflected light are observed changing from second harmonic dominant, three-halves harmonic dominant, to vanishing of both harmonics. Two-dimensional particle-in-cell simulation also suggests that this observation is correlated with the plasma density scale length change. The results demonstrate that the THz emission is closely related to the laser-plasma interaction processes. The emission is strong when resonance absorption is a key feature of the interaction, and becomes much weaker when parametric instabilities dominate.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;  [1]; ;  [1];  [2]; ;  [3]
  1. Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China)
  2. (China)
  3. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China)
Publication Date:
OSTI Identifier:
21611752
Resource Type:
Journal Article
Journal Name:
Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)
Additional Journal Information:
Journal Volume: 84; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevE.84.036405; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1539-3755
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPUTERIZED SIMULATION; HARMONICS; LASERS; PARAMETRIC INSTABILITIES; PLASMA; PLASMA DENSITY; PULSES; RESONANCE ABSORPTION; TWO-DIMENSIONAL CALCULATIONS; ABSORPTION; INSTABILITY; OSCILLATIONS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; SIMULATION; SORPTION

Citation Formats

Li Chun, Zhou Mulin, Ding Wenjun, Du Fei, Liu Feng, Li Yutong, Wang Weimin, Ma Jinglong, Chen Liming, Lu Xin, Dong Quanli, Wang Zhaohua, Wei Zhiyi, Sheng Zhengming, Zhang Jie, Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, Lou Zheng, and Shi Shengcai. Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses. United States: N. p., 2011. Web. doi:10.1103/PHYSREVE.84.036405.
Li Chun, Zhou Mulin, Ding Wenjun, Du Fei, Liu Feng, Li Yutong, Wang Weimin, Ma Jinglong, Chen Liming, Lu Xin, Dong Quanli, Wang Zhaohua, Wei Zhiyi, Sheng Zhengming, Zhang Jie, Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, Lou Zheng, & Shi Shengcai. Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses. United States. doi:10.1103/PHYSREVE.84.036405.
Li Chun, Zhou Mulin, Ding Wenjun, Du Fei, Liu Feng, Li Yutong, Wang Weimin, Ma Jinglong, Chen Liming, Lu Xin, Dong Quanli, Wang Zhaohua, Wei Zhiyi, Sheng Zhengming, Zhang Jie, Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, Lou Zheng, and Shi Shengcai. Thu . "Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses". United States. doi:10.1103/PHYSREVE.84.036405.
@article{osti_21611752,
title = {Effects of laser-plasma interactions on terahertz radiation from solid targets irradiated by ultrashort intense laser pulses},
author = {Li Chun and Zhou Mulin and Ding Wenjun and Du Fei and Liu Feng and Li Yutong and Wang Weimin and Ma Jinglong and Chen Liming and Lu Xin and Dong Quanli and Wang Zhaohua and Wei Zhiyi and Sheng Zhengming and Zhang Jie and Key Laboratory for Laser Plasmas of the Ministry of Education of China and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 and Lou Zheng and Shi Shengcai},
abstractNote = {Interactions of 100-fs laser pulses with solid targets at intensities of 10{sup 18} W/cm{sup 2} and resultant terahertz (THz) radiation are studied under different laser contrast ratio conditions. THz emission is measured in the specular reflection direction, which appears to decrease as the laser contrast ratio varies from 10{sup -8} to 10{sup -6}. Correspondingly, the frequency spectra of the reflected light are observed changing from second harmonic dominant, three-halves harmonic dominant, to vanishing of both harmonics. Two-dimensional particle-in-cell simulation also suggests that this observation is correlated with the plasma density scale length change. The results demonstrate that the THz emission is closely related to the laser-plasma interaction processes. The emission is strong when resonance absorption is a key feature of the interaction, and becomes much weaker when parametric instabilities dominate.},
doi = {10.1103/PHYSREVE.84.036405},
journal = {Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)},
issn = {1539-3755},
number = 3,
volume = 84,
place = {United States},
year = {2011},
month = {9}
}