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5 March 2021 Volumetric meta-optics for augmented image sensors
Andrei Faraon, Gregory Roberts, Conner Ballew, Philip A. Camayd-Muñoz, Tianzhe Zheng, Hyounghan Kwon
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Proceedings Volume 11695, High Contrast Metastructures X; 116951B (2021) https://doi.org/10.1117/12.2581084
Event: SPIE OPTO, 2021, Online Only
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 and polarization with efficiency significantly surpassing two dimensional absorptive and diffractive filters, and ultra-compact polarimetry. The devices are designed via iterative gradient-based optimization to account for multiple target functions while ensuring compatibility with existing nanofabrication processes, and they are experimentally validated using a scaled device that operates at microwave frequencies. This approach combines arbitrary functions into a single compact element, even where there is no known equivalent in bulk optics, enabling novel integrate
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Andrei Faraon, Gregory Roberts, Conner Ballew, Philip A. Camayd-Muñoz, Tianzhe Zheng, and Hyounghan Kwon "Volumetric meta-optics for augmented image sensors", Proc. SPIE 11695, High Contrast Metastructures X, 116951B (5 March 2021); https://doi.org/10.1117/12.2581084
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KEYWORDS
Image sensors
Optical components
Dielectric filters
Integrated photonics
Microwave radiation
Nanofabrication
Optical design
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