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11 June 2024 Temporal synthesis of ultrafast Kerr nonlinearity in plasmonic metamaterials
Jingyi Wu, Anton Yu. Bykov, Anastasiia Zaleska, Anatoly V. Zayats
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Proceedings Volume PC12990, Metamaterials XIV; PC1299011 (2024) https://doi.org/10.1117/12.3015925
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Realizing ultrafast optical control of materials is imperative for advancing the field of optical information processing, nonlinear optics, and time-varying materials. Noble metal-based plasmonics has provided many platforms for achieving optical switching, using strong local field enhancement offered by plasmonic resonances and free-electron plasmonic nonlinearity. However, the switching times in such systems are traditionally constrained by the relaxation of photoexcited hot electrons. In this study, we investigate an interplay between electron relaxation lattice vibrations of the nanostructure. This is achieved by harnessing a temporal Fano-type interference between the rapid relaxation of hot electrons and vibrational dynamics within the plasmonic nanostructure. The effect provides high spectral selectivity and sensitivity to the polarisation of light and geometric parameters of the nanostructure. The results are important for development of nonlinear nanostructure with the tailored transient response.
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Jingyi Wu, Anton Yu. Bykov, Anastasiia Zaleska, and Anatoly V. Zayats "Temporal synthesis of ultrafast Kerr nonlinearity in plasmonic metamaterials", Proc. SPIE PC12990, Metamaterials XIV, PC1299011 (11 June 2024); https://doi.org/10.1117/12.3015925
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KEYWORDS
Plasmonics
Ultrafast phenomena
Nanostructures
Nonlinear metamaterials
Optical metamaterials
Electrons
Optical switching
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