Abstract
The time behavior of gas plasma induced by a few-cycle laser pulse with a simultaneously incident terahertz (THz) pulse is investigated via a transient photocurrent model. The results show that the second-harmonic intensity emitted from the gas plasma can well replicate the THz waveform if the laser pulse has a fixed carrier envelope phase. Based on these we propose a approach for THz coherent detection, which could realize coherent THz detection with very low laser energies and without a bias field, and may be very useful in some fields, such as remote THz sensing.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
William A. Okell, Tobias Witting, Davide Fabris, Dane Austin, Maïmouna Bocoum, Felix Frank, Aurélien Ricci, Aurélie Jullien, Daniel Walke, Jonathan P. Marangos, Rodrigo Lopez-Martens, and John W. G. Tisch
Opt. Lett. 38(19) 3918-3921 (2013)
Aart J. Verhoef, Alma Fernández, Matthias Lezius, Kevin O'Keeffe, Matthias Uiberacker, and Ferenc Krausz
Opt. Lett. 31(23) 3520-3522 (2006)
Miguel A. Porras
J. Opt. Soc. Am. B 30(6) 1652-1659 (2013)