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10 September 2019 Metasurfaces for polarization sensing and imaging (Conference Presentation)
Noah A. Rubin, Paul Chevalier, Wei Ting Chen, Zhujun Shi, Federico Capasso
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Proceedings Volume 11132, Polarization Science and Remote Sensing IX; 111320T (2019) https://doi.org/10.1117/12.2526765
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States
Abstract
Metasurfaces, nanophotonic arrays of subwavelength phase shifting elements, hold promise for the miniaturization of a variety of bulk optical elements. Owing to the flexibility with which their constituent elements may be engineered, metasurfaces allow for point-to-point polarization control on a subwavelength scale. Metasurfaces, then, represent an exciting new platform for polarization optics. A single metasurface may combine many different polarization-dependent functionalities that would ordinarily be spread out over many optical elements. We describe how, through relatively simple optimization methods, a metasurface producing arbitrarily specified polarization states can be designed. This functionality is equivalent to a traditional diffraction grating with individual waveplate optics on each order; here, all the necessary polarization optics can be integrated into a flat, efficient, and ultrathin metasurface optical element. Moreover, such a metasurface can be used in a reverse configuration as a parallel snapshot polarimeter with no need for additional polarization optics. We present a detailed experimental characterization of this device in the visible spectral region and a comparison of the performance of the metasurface to a commercially available rotating waveplate polarimeter. Metasurfaces can enable compact, miniaturized sensors for polarimetry and polarization imaging. We will conclude with a perspective on these possibilities and their implications for remote sensing. Metasurface polarization optics can overcome limitations of previous diffractive/grating based polarimetry schemes are potentially of significant interest to the imaging polarimetry community.
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Noah A. Rubin, Paul Chevalier, Wei Ting Chen, Zhujun Shi, and Federico Capasso "Metasurfaces for polarization sensing and imaging (Conference Presentation)", Proc. SPIE 11132, Polarization Science and Remote Sensing IX, 111320T (10 September 2019); https://doi.org/10.1117/12.2526765
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KEYWORDS
Polarization
Polarimetry
Optical components
Wave plates
Diffraction gratings
Imaging arrays
Integrated optics
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