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arXiv · 2102.03242

Optical Kerr nonlinearity and multi-photon absorption of DSTMS measured by Z-scan method

Jiang Li·Rakesh Rana·Liguo Zhu·Cangli Liu·Harald Schneider·Alexej Pashkin
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Abstract

We investigate the optical Kerr nonlinearity and multi-photon absorption (MPA) properties of DSTMS excited by femtosecond pulses at a wavelengths of 1.43 {\mu}m, which is optimal for terahertz generation via difference frequency mixing. The MPA and the optical Kerr coefficients of DSTMS at 1.43 {\mu}m are strongly anisotropic indicating a dominating contribution from cascaded 2nd-order nonlinearity. These results suggest that the saturation of the THz generation efficiency is mainly related to the MPA process and to a spectral broadening caused by cascaded 2nd-order frequency mixing within DSTMS

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Jiang Li, Rakesh Rana, Liguo Zhu, Cangli Liu, Harald Schneider, Alexej Pashkin. 2021-02-05. Optical Kerr nonlinearity and multi-photon absorption of DSTMS measured by Z-scan method. https://doi.org/10.1364/josab.431986

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