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24 May 2022 Large optical nonlinearity of dielectric metasurface-assisted Mie resonance strongly coupled to an epsilon-near-zero mode
Kuidong Wang, Ai-Yin Liu, Hui-Hsin Hsiao, Cyriaque Genet, Thomas Ebbesen
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Proceedings Volume PC12130, Metamaterials XIII; PC1213008 (2022) https://doi.org/10.1117/12.2624149
Event: SPIE Photonics Europe, 2022, Strasbourg, France
Abstract
Light-matter strong coupling provides a powerful way to modify the nonlinear optical properties of materials. The coupling strength of the state-of-the-art strongly coupled systems are restricted by weak field confinement of the cavity, which limits the enhancement of the optical nonlinearity. Here, we investigate a new type of strong-coupling system, where the Mie resonant modes of the dielectric nanocavities are strongly coupled to an epsilon-near-zero mode, which results in an Rabi splitting of 220 meV. Static and dynamic nonlinear optical measurements reveal a very large enhancement in the intensity-dependent refractive index change at the coupled resonance. In addition, we observe a transient response of hundreds of femtoseconds for the coupled system. The ultrafast and large optical nonlinear coefficients in this work offer a new route towards strong coupling-assisted high-speed photonics.
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Kuidong Wang, Ai-Yin Liu, Hui-Hsin Hsiao, Cyriaque Genet, and Thomas Ebbesen "Large optical nonlinearity of dielectric metasurface-assisted Mie resonance strongly coupled to an epsilon-near-zero mode", Proc. SPIE PC12130, Metamaterials XIII, PC1213008 (24 May 2022); https://doi.org/10.1117/12.2624149
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KEYWORDS
Nonlinear optics
Dielectrics
Femtosecond phenomena
High speed photonics
Optical testing
Refractive index
Resonance enhancement
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