刊名:Journal of Infrared, Millimeter, and Terahertz Waves
出版年:2017
出版时间:January 2017
年:2017
卷:38
期:1
页码:96-103
全文大小:
刊物类别:Physics and Astronomy
刊物主题:Electrical Engineering; Electronics and Microelectronics, Instrumentation; Classical Electrodynamics;
出版者:Springer US
ISSN:1866-6906
卷排序:38
文摘
We report the observation of strong narrowband terahertz emission at 10.6 THz from the common nonlinear second harmonic generation crystal β-barium borate crystal excited by 40 fs laser pulses at a 800 nm center wavelength. The emitted THz field amplitude is linear with incident pump energy with no saturation observed up to 2 mJ of pump pulse energy, and exhibits a crystal azimuthal angular dependence consistent with an optical rectification process. The narrowband emission can be explained by the large dispersion caused by optical phonons in the vicinity of the emission energy.