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3 October 2022 Boosted second-harmonic generation in the half-etching metasurfaces governed by guided resonances and bound states in the continuum (Conference Presentation)
Ze Zheng, Mohsen Rahmani, Xu Lei, Cui-Feng Ying, Lujun Huang
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Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121950W (2022) https://doi.org/10.1117/12.2635867
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
we exploit the resonance inside the slab to boost the second-harmonic generation from the lithium niobate half-etching-slab metasurface system, which hosts two kinds of BIC states formed by TE and TM odd modes. We reveal the mechanisms of the formation of the two BIC states and three main processes that influence the conversion efficiency from the pump light into the SH radiation. This approach of constructing boosted second-harmonic generation can be applied in any low-index nonlinear materials, which can expand a range of the applications, such as nonlinear imaging, quantum light source, and high-resolution sensing.
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Ze Zheng, Mohsen Rahmani, Xu Lei, Cui-Feng Ying, and Lujun Huang "Boosted second-harmonic generation in the half-etching metasurfaces governed by guided resonances and bound states in the continuum (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121950W (3 October 2022); https://doi.org/10.1117/12.2635867
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KEYWORDS
Second-harmonic generation
Nanophotonics
Frequency conversion
Light
Light sources
Light-matter interactions
Lithium niobate
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