Second harmonic generation from an ITO nanolayer: experiment versus theory

L. Rodriguez-Suné; M. Scalora; A. S. Johnson; C. Cojocaru; N. Akozbek; Z. J. Coppens; D. Perez-Salinas; S. Wall; J. Trull

doi:10.1117/12.2555393

1 April 2020 Second harmonic generation from an ITO nanolayer: experiment versus theory

L. Rodriguez-Suné, M. Scalora, A. S. Johnson, C. Cojocaru, N. Akozbek, Z. J. Coppens, D. Perez-Salinas, S. Wall, J. Trull

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Proceedings Volume 11345, Nanophotonics VIII; 113451R (2020) https://doi.org/10.1117/12.2555393
Event: SPIE Photonics Europe, 2020, Online Only

Abstract

We report a comparative experimental and theoretical study of second harmonic generation from a 20nm-thick indium tin oxide nanolayer in the proximity of the epsilon-near-zero condition. We record the efficiency of the second harmonic signal both as a function of wavelength as well as of the angle of incidence around the epsilon-near-zero crossing point. We compare our experimental results with numerical simulations based on a hydrodynamical model able to capture all major physical mechanisms driving the electrodynamic behavior of conductive oxide layers, with unique aspects of the different nonlinear sources. We found a very good quantitative and qualitative agreement between experiment and theory.

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L. Rodriguez-Suné, M. Scalora, A. S. Johnson, C. Cojocaru, N. Akozbek, Z. J. Coppens, D. Perez-Salinas, S. Wall, and J. Trull "Second harmonic generation from an ITO nanolayer: experiment versus theory", Proc. SPIE 11345, Nanophotonics VIII, 113451R (1 April 2020); https://doi.org/10.1117/12.2555393

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