中国物理B ›› 2015, Vol. 24 ›› Issue (8): 88703-088703.doi: 10.1088/1674-1056/24/8/088703

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Theoretical investigation on generating terahertz radiation from gas plasma induced by three-color ultrashort lasers

王成亮a, 杨振刚b, 刘劲松a, 汪盛烈b, 王可嘉a   

  1. a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • 收稿日期:2014-11-08 修回日期:2015-01-15 出版日期:2015-08-05 发布日期:2015-08-05
  • 基金资助:
    Project supported by the Wuhan Applied Basic Research Project, China (Grant No. 20140101010009), the National Natural Science Foundation of China (Grant Nos. 61177095, 61475054, and 61405063), the Natural Science Foundation of Hubei Province, China (Grant Nos. 2012FFA074 and 2013BAA002), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2013KXYQ004, 2014ZZGH021, and 2014QN023), and the Technology Innovation Foundation from Innovation Institute of Huazhong University of Science and Technology, China (Grant No. CXY13Q015).

Theoretical investigation on generating terahertz radiation from gas plasma induced by three-color ultrashort lasers

Wang Cheng-Liang (王成亮)a, Yang Zhen-Gang (杨振刚)b, Liu Jin-Song (刘劲松)a, Wang Sheng-Lie (汪盛烈)b, Wang Ke-Jia (王可嘉)a   

  1. a Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China;
    b School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2014-11-08 Revised:2015-01-15 Online:2015-08-05 Published:2015-08-05
  • Contact: Wang Ke-Jia E-mail:wkjtode@sina.com
  • Supported by:
    Project supported by the Wuhan Applied Basic Research Project, China (Grant No. 20140101010009), the National Natural Science Foundation of China (Grant Nos. 61177095, 61475054, and 61405063), the Natural Science Foundation of Hubei Province, China (Grant Nos. 2012FFA074 and 2013BAA002), the Fundamental Research Funds for the Central Universities, China (Grant Nos. 2013KXYQ004, 2014ZZGH021, and 2014QN023), and the Technology Innovation Foundation from Innovation Institute of Huazhong University of Science and Technology, China (Grant No. CXY13Q015).

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摘要： Generation of intense broadband terahertz (THz) waves from gas plasma induced by tri-color ultrashort (fundamental (ω), second harmonic (2ω), and third harmonic (3ω)) laser pulses is theoretically investigated. Simulation results show that the 3ω laser pulse can greatly enhance or suppress the generation of THz wave at different values of relative phase (θ3) between the 3ω and ω fields. Moreover, the polarities of the generated THz waves can be controlled by changing θ3, with the relative phase θ2 (between the 2ω and ω fields) fixed to be a certain value. All of our results show that θ3 plays a key role in the generation process, which promises to control the intensity as well as the polarity of gas plasma-induced THz radiation.

关键词: terahertz, ultrashort laser, photocurrent model, plasma

Abstract: Generation of intense broadband terahertz (THz) waves from gas plasma induced by tri-color ultrashort (fundamental (ω), second harmonic (2ω), and third harmonic (3ω)) laser pulses is theoretically investigated. Simulation results show that the 3ω laser pulse can greatly enhance or suppress the generation of THz wave at different values of relative phase (θ3) between the 3ω and ω fields. Moreover, the polarities of the generated THz waves can be controlled by changing θ3, with the relative phase θ2 (between the 2ω and ω fields) fixed to be a certain value. All of our results show that θ3 plays a key role in the generation process, which promises to control the intensity as well as the polarity of gas plasma-induced THz radiation.

Key words: terahertz, ultrashort laser, photocurrent model, plasma

中图分类号: 

  • 87.50.U-
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 78.20.Bh (Theory, models, and numerical simulation) 41.75.Jv (Laser-driven acceleration?)