Dual excitation beam deflection in nonlinear epsilon-near-zero materials

Adam R. Ball; Ray Secondo; Dhruv Fomra; Vitaly Avrutin; Umit Ozgur; Nathaniel Kinsey

doi:10.1117/12.2632849

3 October 2022 Dual excitation beam deflection in nonlinear epsilon-near-zero materials

Adam R. Ball, Ray Secondo, Dhruv Fomra, Vitaly Avrutin, Umit Ozgur, Nathaniel Kinsey

Proceedings Volume PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X; PC122280J (2022) https://doi.org/10.1117/12.2632849
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

Epsilon-near-zero materials are a rapidly expanding field due to their enhanced light matter interaction. These materials have shown large changes in refractive index on the order of the linear index; however, this is associated with large absorption changes. Here we experimentally and theoretically show a method to mitigate the absorption changes in the film while doubling the refractive index modulation. Using beam deflection, a nonlinear technique to measure χ^((3)), individual excitation processes can be controlled in time and space on a film so the nonlinear refractive index change can double on a sample, while the absorption change can be nullified.

Conference Presentation

Citation Download Citation

Adam R. Ball, Ray Secondo, Dhruv Fomra, Vitaly Avrutin, Umit Ozgur, and Nathaniel Kinsey "Dual excitation beam deflection in nonlinear epsilon-near-zero materials", Proc. SPIE PC12228, Ultrafast Nonlinear Imaging and Spectroscopy X, PC122280J (3 October 2022); https://doi.org/10.1117/12.2632849

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