Custom narrowband optical wavefronts with nonlocal and thermal metasurfaces

Adam Overvig; Andrea Alù

doi:10.1117/12.2610719

5 March 2022 Custom narrowband optical wavefronts with nonlocal and thermal metasurfaces

Adam Overvig, Andrea Alù

Proceedings Volume PC12012, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XV; PC1201205 (2022) https://doi.org/10.1117/12.2610719
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We demonstrate that nonlocal metasurfaces based on quasi-bound states in the continuum (q-BICs) are a key enabling technology for highly efficient and highly selective flat optics. We show that spatially varying a small geometric perturbation across an otherwise regular array confers control over the leakage to free-space of otherwise bound states. The result is an ultrasharp Fano resonant response that engages light exclusively within the bandwidth of the resonance; nonresonant light is unaffected. This capability enables customized narrowband transformations of electromagnetic waves for use in highly multifunctional flat optics, including thermal metasurfaces capable of generating quasi-monochromatic designer wavefronts.

Conference Presentation

Citation Download Citation

Adam Overvig and Andrea Alù "Custom narrowband optical wavefronts with nonlocal and thermal metasurfaces", Proc. SPIE PC12012, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XV, PC1201205 (5 March 2022); https://doi.org/10.1117/12.2610719

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