Metasurface Polarization Optics and Imaging
Abstract
Using advanced design metasurface gratings were created; the significant step was taken of combining it with a conventional, intensity-only imaging system, converting it with just a single component into one capable of full-Stokes polarimetry. Using topology optimized metasurfaces were demonstrated with arbitrary shape birefringence. The latter has the unique feature that it can be continuously tuned from linear to elliptical birefringence by changing the angle of incidence. In this way, a single metasurface can operate as many waveplates in parallel, implementing different polarization transformations. Holograms were demonstrated that implement arbitrary parallel polarization analysis, as well as a hologram that implements all birefringent waveplates simultaneously in its far-field. Metasurfaces were realized that enact a longitudinally varying polarization behavior along the optical axis, implementing virtual analyzers and waveplates with axes that rotate along the propagation direction. New supercell metasurfaces were designed and implemented that exhibit multiple independent optical functions at arbitrary large deflection angles with high efficiency such as Gaussian, vortex and Bessel beams. 2D phase and polarization singularity sheets were realized. Singularity engineering of the dark enables new degrees of freedom for light-matter interaction and can inspire similar field topologies beyond optics, from electron beams to acoustics. Accomplishments: a. Imaging polarimetry with metagratings; b. Continuous angle-tunable birefringence with freeform metasurfaces; c. Jones Matrix Holography with metasurfaces; d. Metasurface optics for on- demand polarization transformations along the optical path; e. Multifunctional wide-angle optics based on supercell metasurfaces; f. Engineering 2D phase and polarization singularities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 27, 2023
- Accession Number
- AD1230877
Entities
People
- Federico Capasso
Organizations
- Harvard College