The interaction between an intense laser and a cotraveling relativistic dense electron beam could result in the downshifting of the laser frequency. It is theoretically analyzed that this process can generate a coherent terahertz radiation. The radiation energy could reach the order of 1 mJ per shot in the duration of 100 ps, or a temporal radiation power of 10 MW, with a set of practically relevant parameters.
© 2013 Optical Society of America
Lasers and Laser Optics
Original Manuscript: August 3, 2013
Revised Manuscript: September 18, 2013
Manuscript Accepted: September 24, 2013
Published: November 5, 2013
S. Son, Sung Joon Moon, and J. Y. Park, "Frequency downshift of Nd:YAG lasers and terahertz radiation," Opt. Lett. 38, 4578-4580 (2013)