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Volumetric meta-optics for sorting light by color, polarization, and angle of incidence

Faraon, Andrei and Ballew, Conner and Roberts, Gregory and Foo, Ian (2022) Volumetric meta-optics for sorting light by color, polarization, and angle of incidence. In: High Contrast Metastructures XI. Proceedings of SPIE. No.PC12011. Society of Photo-optical Instrumentation Engineers , Bellingham, WA, Art. No. PC120110D.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription Presentation
Faraon, Andrei0000-0002-8141-391X
Ballew, Conner0000-0003-4854-8342
Additional Information:© 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:PC12011
Record Number:CaltechAUTHORS:20220307-189693000
Persistent URL:
Official Citation: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);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:113781
Deposited By: George Porter
Deposited On:08 Mar 2022 23:13
Last Modified:08 Mar 2022 23:13

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