Emission of Terahertz Radiation from SiC

Details Emission of Terahertz Radiation from SiC Emission of Terahertz Radiation from SiC

2008-09-04

arxiv.org/abs/0809.0756v2

Physics

Condensed Matter

Materials Science

4 pages, 5 figures

Scientific paper

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 $\chi_{zzz}^{(2)}/\chi_{zxx}^{(2)}$ and the complex index of refraction of silicon carbide at THz frequencies.

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