We report the emission of strong coherent broadband terahertz radiation from 6H-Silicon-Carbide (SiC) excited with optical pulses. The measured terahertz spectral signal-to-noise ratio is better than one thousand. We determine that the terahertz radiation is generated via second order optical nonlinearity (optical rectification). We present a measurement of the ratio of nonlinear susceptibility tensor elements χzzz(2)/χzxx(2) and the complex index of refraction of silicon carbide at THz frequencies.
@article{arxiv.0809.0756,
title = {Emission of Terahertz Radiation from SiC},
author = {Jared H. Strait and Paul A. George and Jahan Dawlaty and Shriram Shivaraman and Mvs Chandrashekhar and Farhan Rana and Michael G. Spencer},
journal= {arXiv preprint arXiv:0809.0756},
year = {2015}
}