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arXiv · 2204.12646

Electron spill-out effect on third-order optical nonlinearity of metallic nanostructure

Takashi Takeuchi·Kazuhiro Yabana
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Abstract

Over the last three decades, plasmonics using metallic nanostructures has become central to nanophotonics research. Recently, its targets have been extended to nonlinear optical phenomena. In a nonlinear regime, quantum mechanical effects, as exemplified by electron spill-out on the surface of nanostructures, significantly influence the optical response. Quantum hydrodynamic theory (QHT) is a promising basis for the analysis of nonlinear optical responses involving such quantum mechanical effects. Herein, QHT was applied to calculate the third-order optical nonlinearity of a spherical metallic nanostructure. The results demonstrate how electron spill-out strongly affects plasmon resonance and third-order optical nonlinearity.

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Takashi Takeuchi, Kazuhiro Yabana. 2022-04-27. Electron spill-out effect on third-order optical nonlinearity of metallic nanostructure. https://doi.org/10.1103/physreva.106.063517

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