Abstract-Mode-selective terahertz emission from rippled air irradiated by femtosecond laser pulses

http://iopscience.iop.org/1882-0786/7/4/046202/article

Junghun Shin1, Alexei Zhidkov2, Zhan Jin2, Tomonao Hosokai2 and Ryosuke Kodama1,2,3

1 Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
2 Photon Pioneers Center, Osaka University, Suita, Osaka 565-0871, Japan
3 Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
 

Junghun Shin et al 2014 Appl. Phys. Express 7 046202. doi:10.7567/APEX.7.046202
Received 20 December 2013, accepted for publication 9 March 2014. Published 28 March 2014.
© 2014 The Japan Society of Applied Physics

Abstract

Terahertz (THz) emission from rippled air is studied in multidimensional particle-in-cell simulations that include optical field ionization. The ionization modulation in a plasma channel produced by a laser pulse propagating along a ripple and the pulse self-focusing result in THz mode selection with the generation of intense signals having quasi-monochromatic spectral distributions.