https://doi.org/10.1051/epjconf/202430908006
Phase-Matched Second-Harmonic Generation from Metasurfaces Inside Multipass Cells
1 Photonics Laboratory, Physics Unit, Tampere University, FI-33014 Tampere, Finland
2 Center for Photonics Sciences, University of Eastern Finland, P.O. Box 111, FI-80101, Joensuu, Finland
* Corresponding author: mikko.huttunen@tuni.fi
Published online: 31 October 2024
We demonstrate a scalable approach to increase conversion efficiencies of nonlinear metasurfaces by incorporating them into multipass cells and allowing the pump beam to pass several times through the metasurfaces. As a proof of principle, we achieve phase matching of the second-harmonic generation (SHG) signal with superlinear dependence on the number of passes. We measure an order of magnitude enhancement in the SHG signal when the incident pump traverses the metasurface up to 9 passes. The generic nature of our approach holds promise for diverse applications in nonlinear optics.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
