Nonlinear optical properties of inhomogeneous thin films

Yeshaiahu Fainman; Muhan Yang; Chenghuan Gao; H-H Lin; Alex Friedman; Dmitrii Belogolovskii

doi:10.1117/12.2637323

3 October 2022 Nonlinear optical properties of inhomogeneous thin films

Yeshaiahu Fainman, Muhan Yang, Chenghuan Gao, H-H Lin, Alex Friedman, Dmitrii Belogolovskii

Proceedings Volume PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X; PC122280I (2022) https://doi.org/10.1117/12.2637323
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Ultrafast modulation, switching and optical wave mixing are essential functionalities for various CMOS compatible photonic integrated circuits with applications for optical communication, signal processing and computing. We explore second and third order nonlinear susceptibilities of various inhomogeneous thin film compositions and characterize their properties using a Maker fringes setup and ultrashort femtosecond scale laser pulses. Specifically, we demonstrate enhanced effective second order nonlinear response by engineering the compositions to create a strong internal DC electric fields (~20 pm/V) as well as synthesizing silicon rich silicon nitride films with high second order nonlinear polarizability (~8 pm/V) in as grown films.

Conference Presentation

Citation Download Citation

Yeshaiahu Fainman, Muhan Yang, Chenghuan Gao, H-H Lin, Alex Friedman, and Dmitrii Belogolovskii "Nonlinear optical properties of inhomogeneous thin films", Proc. SPIE PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X, PC122280I (3 October 2022); https://doi.org/10.1117/12.2637323

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