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5 March 2021 Nonlocal metasurfaces
Adam Overvig, Andrea Alù
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Proceedings Volume 11695, High Contrast Metastructures X; 1169515 (2021) https://doi.org/10.1117/12.2579073
Event: SPIE OPTO, 2021, Online Only
Abstract
We discuss our recent advances on metasurfaces based on highly nonlocal features, stemming from long-range interactions and lattice phenomena. Different from conventional metasurface approaches, nonlocality offers tailored spectral control, both temporally and spatially, ideal for signal processing applications, and combined with enhanced light-matter interactions. We achieve these features by combining quasi-bound states in the continuum with geometric phase variations, tailoring at will the supported eigenwaves. The resulting high-contrast metasurfaces support ultrasharp responses selective to the impinging wave properties, effectively realizing ultrathin transparent films that highly reflect light only when illuminated by selected polarization, frequency and wavefront distribution. The demonstrated wavefront selectivity of nonlocal metasurfaces opens opportunities for augmented reality, secure communications, optical modulators and enhanced light-matter interactions.
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Adam Overvig and Andrea Alù "Nonlocal metasurfaces", Proc. SPIE 11695, High Contrast Metastructures X, 1169515 (5 March 2021); https://doi.org/10.1117/12.2579073
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KEYWORDS
Light-matter interactions
Wavefronts
Augmented reality
Dielectric polarization
Dielectrics
Nonlinear optics
Optical communications
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