Two-beam nonlinearity in indium tin oxide in the continuous wave limit

Jared K. Wahlstrand; Chad D. Cruz

doi:10.1117/12.2651553

15 March 2023 Two-beam nonlinearity in indium tin oxide in the continuous wave limit

Jared K. Wahlstrand, Chad D. Cruz

Proceedings Volume 12419, Ultrafast Phenomena and Nanophotonics XXVII; 124190B (2023) https://doi.org/10.1117/12.2651553
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Indium Tin Oxide (ITO) is an example of a material with a greatly enhanced optical nonlinearity for wavelengths at which the dielectric permittivity is near zero. Its enormous nonlinearity may enable compact photonic devices. All-optical devices involve multiple beams, and it was found recently that two-beam interaction modifies the effective nonlinearity in ITO for co-polarized beams. In that work, results of a degenerate pump-probe experiment were compared to a numerical model of the hot electron nonlinearity in ITO. The numerical model successfully explained the polarization dependent differential transmission and reflection, including the dependence on the chirp of the pulses. Here, we consider a simpler analytical model for the two-beam interaction in the continuous wave limit. We directly test this analytical model using a nondegenerate pump-probe transmission experiment using long pulses and find reasonable agreement.

Conference Presentation

Citation Download Citation

Jared K. Wahlstrand and Chad D. Cruz "Two-beam nonlinearity in indium tin oxide in the continuous wave limit", Proc. SPIE 12419, Ultrafast Phenomena and Nanophotonics XXVII, 124190B (15 March 2023); https://doi.org/10.1117/12.2651553

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