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Article Dans Une Revue Optics Letters Année : 2021

Experimental demonstration of second-harmonic generation in high χ2 metasurfaces

Résumé

Metasurfaces able to concentrate light at various wavelengths are promising for enhancing nonlinear interactions. In this Letter, we experimentally demonstrate infrared second-harmonic generation (SHG) by a multi-resonant nanostructure. A 100 GaAs layer embedded in a metal-insulator-metal waveguide is shown to support various localized resonances. One resonance enhances the nonlinear polarization due to the transverse magnetic (TM)-polarized pump wavelength near 3.2µm, while another is set near the TE-polarized generated wavelength (1.6µm). The measured SHG efficiency is higher than 10−9W−1 for pump wavelengths ranging from 2.9 to 3.3µm, which agrees with theoretical computations. This is typically 4 orders of magnitude higher than the equivalent GaAs membrane.
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Dates et versions

hal-03178299 , version 1 (23-03-2021)

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Léna Soun, Baptiste Fix, Hasnaa El Ouazzani, Sébastien Héron, Nathalie Bardou, et al.. Experimental demonstration of second-harmonic generation in high χ2 metasurfaces. Optics Letters, 2021, 46 (6), pp.1466-1469. ⟨10.1364/ol.415257⟩. ⟨hal-03178299⟩
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