Terahertz emission in tenuous gases irradiated by ultrashort laser pulses

WANG Wei-Min; SHENG Zheng-Ming; WU Hui-Chun; CHEN Min; LI Chun; ZHANG Jie

doi:10.1088/1674-1137/33/S2/037

Chinese Physics C> 2009, Vol. 33> Issue(S2) : 142-145 DOI: 10.1088/1674-1137/33/S2/037

Terahertz emission in tenuous gases irradiated by ultrashort laser pulses

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Abstract：
Mechanism of terahertz (THz) pulse generation in gases irradiated by ultrashort laser pulses is investigated theoretically. Quasi-static transverse currents produced by laser field ionization of gases and the longitudinal modulation in formed plasmas are responsible for the THz emission at the electron plasma frequency, as demonstrated by particle-in-cell simulations including field ionization. The THz field amplitude scaling with the laser amplitude within a large range is also discussed.

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WANG Wei-Min, SHENG Zheng-Ming, WU Hui-Chun, CHEN Min, LI Chun and ZHANG Jie. Terahertz emission in tenuous gases irradiated by ultrashort laser pulses[J]. Chinese Physics C, 2009, 33(S2): 142-145. doi: 10.1088/1674-1137/33/S2/037

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Received: 2009-01-05
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Terahertz emission in tenuous gases irradiated by ultrashort laser pulses

Corresponding author: SHENG Zheng-Ming,

Received Date: 2009-01-05

Accepted Date: 1900-01-01

Available Online: 2009-01-08

Abstract: Mechanism of terahertz (THz) pulse generation in gases irradiated by ultrashort laser pulses is investigated theoretically. Quasi-static transverse currents produced by laser field ionization of gases and the longitudinal modulation in formed plasmas are responsible for the THz emission at the electron plasma frequency, as demonstrated by particle-in-cell simulations including field ionization. The THz field amplitude scaling with the laser amplitude within a large range is also discussed.

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Terahertz emission in tenuous gases irradiated by ultrashort laser pulses

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