Second harmonic generation at a time-varying interface | ResearchBunny

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Abstract

This work investigates second harmonic generation (SHG) at a time-varying interface between air and a 310 nm Indium Tin Oxide (ITO) film. Optical pumping induces a modulation contrast at the second harmonic wavelength up to 93%, resulting in significant frequency broadening and shift. The study experimentally demonstrates that the temporal modulation of the second-order nonlinear susceptibility significantly contributes to this enhancement. The frequency-modulated spectra from single and double-slit time diffraction are proposed for applications in optical computing and sensing.

Publisher

Nature Communications

Published On

Sep 05, 2024

Authors

Romain Tirole, Stefano Vezzoli, Dhruv Saxena, Shu Yang, T. V. Raziman, Emanuele Galiffi, Stefan A. Maier, John B. Pendry, Riccardo Sapienza

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