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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 11, Iss. 10 — Oct. 1, 2013
  • pp: 101402–

Influence of optical wavelength on terahertz radiation from laser-induced air plasma

Siqing Wu, Jinsong Liu, Shenglie Wang, and Yanan Zeng  »View Author Affiliations


Chinese Optics Letters, Vol. 11, Issue 10, pp. 101402- (2013)


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Abstract

Using a well-developed transient photocurrent model, we combine theoretical and numerical studies on the production of terahertz (THz) radiation in laser-induced air plasma. Air molecules are excited and then ionized by the laser-pulses mixing the fundamental and second harmonic fields. As a result, a non-vanishing directional photoelectron current emerges, radiating the THz pulse wave. We mainly discuss the influences of optical wavelength on THz radiation in five different cases. Results show that the fundamental-pulse width (50 fs), energy, and relative phase between two pulses are invariant. When the laser wavelength (from 400 nm to 1.25 \mu m) becomes longer, the emitted THz fields are significantly enhanced, with a linear dependence on the optical wavelength.

© 2013 Chinese Optics Letters

OCIS Codes
(140.3440) Lasers and laser optics : Laser-induced breakdown
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(320.2250) Ultrafast optics : Femtosecond phenomena
(260.7120) Physical optics : Ultrafast phenomena

ToC Category:
Lasers and Laser Optics

Citation
Siqing Wu, Jinsong Liu, Shenglie Wang, and Yanan Zeng, "Influence of optical wavelength on terahertz radiation from laser-induced air plasma," Chin. Opt. Lett. 11, 101402- (2013)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-11-10-101402


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