Resonant metasurfaces: wavelength-selective wavefront shaping and nonlinear generation

Nanfang Yu

doi:10.1117/12.3002722

13 March 2024 Resonant metasurfaces: wavelength-selective wavefront shaping and nonlinear generation

Nanfang Yu

Proceedings Volume PC12897, High Contrast Metastructures XIII; PC1289705 (2024) https://doi.org/10.1117/12.3002722
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Metasurfaces—structured planarized optical devices with a thickness thinner than or comparable to the wavelength of light—typically support a “local” response, i.e., they tailor the optical wavefront through the independent response of each meta-unit. In contrast, “nonlocal” metasurfaces are characterized by an optical response dominated by collective modes over many meta-units. In this talk, I will illustrate a rational design paradigm using quasi-bound states in the continuum to realize nonlocal metasurfaces. I will report experimental demonstration of a few device functionalities: (a) devices that produce narrowband spatially tailored wavefronts at multiple selected wavelengths and yet are otherwise transparent, (b) nonlocal metasurfaces based on CMOS-compatible dielectric materials with thermo-optically reconfigurable wavefronts, and (c) nonlinear resonant GaN metasurfaces growth by templated molecular beam epitaxy for efficient sum frequency generation.

Conference Presentation

Citation Download Citation

Nanfang Yu "Resonant metasurfaces: wavelength-selective wavefront shaping and nonlinear generation", Proc. SPIE PC12897, High Contrast Metastructures XIII, PC1289705 (13 March 2024); https://doi.org/10.1117/12.3002722

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