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Second harmonic generation in glass-based metasurfaces using tailored surface lattice resonances

Das Gupta, T and Martin-Monier, L and Butet, J and Yang, K-Y and Leber, A and Dong, C and Nguyen-Dang, T and Yan, W and Martin, OJF and Sorin, F (2021) Second harmonic generation in glass-based metasurfaces using tailored surface lattice resonances. In: Nanophotonics .

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Official URL: https://doi.org/10.1515/nanoph-2021-0277


Dielectric metasurfaces have shown prominent applications in nonlinear optics due to strong field enhancement and low dissipation losses at the nanoscale. Chalcogenide glasses are one of the promising materials for the observation of nonlinear effects thanks to their high intrinsic nonlinearities. Here, we demonstrate, experimentally and theoretically, that significant second harmonic generation (SHG) can be obtained within amorphous Selenium (Se)-based chalcogenide metasurfaces by exploiting the coupling between lattice and particle resonances. We further show that the high-quality factor resonance at the origin of the SHG can be tuned over a wide wavelength range using a simple and versatile fabrication approach. The measured second harmonic intensity is orders of magnitude higher than that from a dewetted Se film consisting of random Se nanoparticles. The achieved conversion efficiency in the resonance region is of the order of 10-6 which is comparable with direct bandgap materials and at least two orders of magnitude higher than that of conventional plasmonics- and Si-based structures. Fabricated via a simple and scalable technique, these all-dielectric architectures are ideal candidates for the design of flat nonlinear optical components on flexible substrates. © 2021 Tapajyoti Das Gupta et al., published by De Gruyter, Berlin/Boston 2021.

Item Type: Journal Article
Publication: Nanophotonics
Publisher: De Gruyter Open Ltd
Additional Information: The copyright for this article belongs to Authors
Keywords: Chalcogenides; Glass; Harmonic analysis; Harmonic generation; Resonance, Amorphous selenium; Bandgap materials; Chalcogenide glass; Flexible substrate; High quality factors; Non-linear optical; Orders of magnitude; Tailored surfaces, Nonlinear optics
Department/Centre: Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 03 Dec 2021 07:52
Last Modified: 03 Dec 2021 07:52
URI: http://eprints.iisc.ac.in/id/eprint/70165

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