Multifunctional volumetric meta-optics for color and polarization image sensors
Abstract
Three-dimensional elements, with refractive index distribution structured at sub-wavelength scale, provide an expansive optical design space that can be harnessed for demonstrating multi-functional free-space optical devices. Here we present 3D dielectric elements, designed to be placed on top of the pixels of image sensors, that sort and focus light based on its color and polarization with efficiency significantly surpassing 2D absorptive and diffractive filters. The devices are designed via iterative gradient-based optimization to account for multiple target functions while ensuring compatibility with existing nanofabrication processes, and 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 integrated photonic applications.
Additional Information
© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement. Received 26 November 2019; revised 18 February 2020; accepted 5 March 2020 (Doc. ID 384228); published 31 March 2020. The authors thank Maria Alonso-delPino for assistance and advice regarding near-field microwave imaging. The measurements were carried out at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. We would also like to thank Professor Oscar Bruno from California Institute of Technology and Professor Amir Arbabi from University of Massachusetts Amherst for useful discussions during the completion of this work. Funding: Defense Advanced Research Projects Agency (HR00111720035); National Institutes of Health (1R21EY029460-01). The authors declare no conflicts of interest.Attached Files
Published - optica-7-4-280.pdf
Submitted - 2002.12890.pdf
Supplemental Material - 4296347.pdf
Supplemental Material - FocalPlaneIntensityExperimentXPol.avi
Supplemental Material - FocalPlaneIntensityExperimentYPol.avi
Supplemental Material - FocalPlaneIntensitySimulationLayeredXPol.avi
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Additional details
- Alternative title
- Multi-functional volumetric meta-optics for color and polarization image sensors
- Eprint ID
- 102347
- Resolver ID
- CaltechAUTHORS:20200406-102508245
- NASA/JPL/Caltech
- HR00111720035
- Defense Advanced Research Projects Agency (DARPA)
- 1R21EY029460-01
- NIH
- Created
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2020-04-06Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field