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arXiv · 2005.02080

Transient perturbative nonlinear responses of plasmonic materials

Mikko J. Huttunen·Jussi Kelavuori·Marco Ornigotti
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Abstract

Recent investigations on optical nonlinearities of plasmonic materials suggest their responses may be even beyond the usual perturbative description. To better understand these surprisingly strong responses, we develop here a simple but general approach to describe the nonlinear optical response of plasmonic materials up to $n$th perturbation order. We apply the approach to understand spectral broadening occurring in resonant metasurfaces and investigate the enhancement of high-harmonic generation from multiply-resonant metasurfaces, predicting an over million-fold enhancement of higher harmonics.

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Mikko J. Huttunen, Jussi Kelavuori, Marco Ornigotti. 2020-05-05. Transient perturbative nonlinear responses of plasmonic materials. https://doi.org/10.1103/physreva.102.063525

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