Third order difference frequency generation of mid-infrared light

Kai Wang; Jizhou Wang; Nathan Marshall; Zhenhuan Yi; Alexei V. Sokolov; Wenxuan YY Yu; Xingqi Xu; Dawei Wang

doi:10.1117/12.2692818

13 March 2024 Third order difference frequency generation of mid-infrared light

Kai Wang, Jizhou Wang, Nathan Marshall, Zhenhuan Yi, Alexei V. Sokolov, Wenxuan YY Yu, Xingqi Xu, Dawei Wang

Proceedings Volume PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII; PC128690S (2024) https://doi.org/10.1117/12.2692818
Event: SPIE LASE, 2024, San Francisco, California, United States

Conference Poster

Abstract

We study Four Wave Mixing (FWM) generated based on a mid-infrared pulse and a near infrared pulse. The mid infrared light is near resonant with vibrational modes of molecule, and it can create a coherence between vibrational states. The near infrared light will probe the coherence and result in FWM based on third order nonlinearity through different pathways. One pathway is a third-order Sum Frequency Generation (tSFG) and the other is a third-order Difference Frequency Generation (tDFG). We report experimental investigation of a time resolved tDFG generated from plastic materials such as mixed beads and a thin Low-Density Polyethylene (LDPE) film. We compare results of the tDFG with that of the tSFG in terms of their intensities and phase matching conditions. Our results show that a vibrational spectroscopy combing the tDFG and the tSFG can be versatile tools in studying of physical chemistry, dynamics of complicated molecular system, bioimaging and so on.

Citation Download Citation

Kai Wang, Jizhou Wang, Nathan Marshall, Zhenhuan Yi, Alexei V. Sokolov, Wenxuan YY Yu, Xingqi Xu, and Dawei Wang "Third order difference frequency generation of mid-infrared light", Proc. SPIE PC12869, Nonlinear Frequency Generation and Conversion: Materials and Devices XXIII, PC128690S (13 March 2024); https://doi.org/10.1117/12.2692818

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