Terahertz generation in Czochralski grown periodically poled Mg:Y:LiNbO3 via optical rectification

Details Terahertz generation in Czochralski grown periodically poled Mg:Y:LiNbO3 via optical rectification Terahertz generation in Czochralski grown periodically poled Mg:Y:LiNbO3 via optical rectification

2005-03-22

arxiv.org/abs/physics/0503173v1

JOSA B, v.23, No.1, p. 81-89 (2006).

Physics

Optics

25 pages, 4 figures

Scientific paper

10.1364/JOSAB.23.000081

Using a canonical pump-probe experimental technique, we studied the terahertz (THz) waves generation and detection via optical rectification and mixing in Czochralski-grown periodically poled Mg:Y:LiNbO3 (PPLN) crystals. THz waves with frequencies at 1.37 THz and 0.68 THz as well as 1.8 THz were obtained for PPLN with nonlinear grating periods of 0.03 and 0.06 mm, respectively. A general theoretical model was developed by considering the dispersion and damping of low frequency phonon-polariton mode. Our results show that THz waves are generated in forward and backward directions via pumping pulse rectification. The generated THz waves depend on the spectral shape of the laser pulses, quasi-phase mismatches and dispersion characteristics of a crystal.

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