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5 March 2022 Volumetric meta-optics for sorting light by color, polarization, and angle of incidence
Andrei Faraon, Conner Ballew, Gregory Roberts, Ian Foo
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Proceedings Volume PC12011, High Contrast Metastructures XI; PC120110D (2022) https://doi.org/10.1117/12.2613610
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Three-dimensional elements, with refractive index distribution structured at subwavelength scale, provide an expansive optical design space that can be harnessed for demonstrating multifunctional free-space optical devices. We present three dimensional dielectric elements, designed to be placed on top of the pixels of image sensors that provide different functionalities like sorting and focusing of light based on its color, polarization and incidence angle. The devices are designed via iterative gradient-based optimization to account for multiple target functions while ensuring compatibility with existing nanofabrication processes. This approach combines arbitrary functions into a single compact element, even where there is no known equivalent in bulk optics, enabling novel integrated photonic applications. We analyze how the device behaves for input parameters that it was not designed for and investigate how the arrangement of the imaging pixels affects the device performance.
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Andrei Faraon, Conner Ballew, Gregory Roberts, and Ian Foo "Volumetric meta-optics for sorting light by color, polarization, and angle of incidence", Proc. SPIE PC12011, High Contrast Metastructures XI, PC120110D (5 March 2022); https://doi.org/10.1117/12.2613610
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KEYWORDS
Dielectric polarization
Optical components
Astronomical imaging
Dielectrics
Image sensors
Integrated optics
Integrated photonics
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