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Polarimetric Compressed Sensing with Hollow, Self-Assembled Diffractive Films.

Ji Feng¹, Altai Perry¹, Xiaojing Weng¹

¹Department of Mechanical Engineering, University of California at Riverside, Riverside, California 92521, United States.

|January 23, 2025

Summary

This summary is machine-generated.

This study introduces a novel nanophotonic pipeline using self-assembled optical encoders for advanced light polarization and wavefront sensing. This method enhances imaging capabilities and reduces sampling needs for polarization cameras.

Keywords:

colloidal self-assembly compressed sensing hollow nanospheres photonic crystal thin films.polarimetric sensing

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Area of Science:

Nanophotonics
Optical Engineering
Computational Imaging

Background:

Polarization and wavefront sensing offer insights for surface assessment, material identification, and imaging in challenging environments.
Conventional polarization cameras suffer from reduced resolution due to multiple sensor measurements and filtering optics.

Purpose of the Study:

To develop a nanophotonic pipeline for compressive sensing of light polarization and wavefront information.
To reduce sampling requirements in polarization imaging through novel optical encoders.

Main Methods:

Utilized a low-refractive-index, self-assembled optical encoder composed of nanostructures.
Engineered nanostructures to scatter light into lattice modes encoding wavefront direction and polarization ellipticity.
Integrated optical encoders with a neural network for predicting polarization and pointing information.

Main Results:

Demonstrated that random optical encoders achieve higher resolution by blurring interference patterns.
Showcased the modulation and spatial multiplexing of light polarization by self-assembled hollow nanocavity arrays.
Achieved prediction of wavefront direction and polarization ellipticity from diffracted interference patterns.

Conclusions:

The proposed nanophotonic pipeline enables compressive sensing for polarization and wavefront analysis.
Self-assembled hollow nanocavity arrays offer a distinct material class for optical encoding, distinct from metasurfaces.
This technology has potential applications in optical computing, compressed sensing, and advanced imaging systems.