Sunday, August 28, 2016
Abstract- Possibility of high-energy THz generation in LiTaO3
L. Tokodi, A. Buzády, J. Hebling, L. Pálfalvi,
Due to the absence of the detrimental three-photon absorption, LiTaO is a promising crystal for terahertz generation when pumping with an 800-nm pump wavelength. The nonlinear optical, photorefractive and dielectric (except the bandwidth) properties at the optical and the terahertz wavelength are very similar to those of LiNbO. The absorption coefficient and refractive index spectra of 1 mol% Mg-doped stoichiometric LiTaO measured by terahertz time domain spectroscopy are presented. Optimization calculations have been performed, and results for a hybrid-type high-energy terahertz source using LiTaO are presented. About 90 % diffraction efficiency is predicted with a practically feasible contact grating.