Abstract

Terahertz (THz) wave generation in a periodically poled Mg:LiNbO3 crystal was detected by a pump–probe technique and analyzed using frequency and time–frequency spectra. Multifrequency THz waves were clearly observed, providing information about the domain structure of the crystal. A theoretical T-function model was used to fit the frequency spectrum. A method that can characterize the detailed domain structure and THz capabilities of the inner crystal’s parts is proposed.

© 2009 Optical Society of America

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