High Index Multi-Layer Metasurfaces for Broadband Polarization Control
Abstract
The proposed research in cooperation with Professor Uriel Levy of the Hebrew University in Jerusalem will develop compact devices for controlling phase and polarization properties of optical radiation. Specifically, multi-layer, all-dielectric metasurfaces will be developed with high index dielectrics such as silicon, instead of metals/plasmonic materials. The proposed metasurfaces will exhibit low-loss and broad bandwidth performance, and their fabrication will be compatible with CMOS processes. This fundamental research will enable the development of compact polarimetric optical systems with unprecedented performance. This is a collaborative research with the group of Prof. Uriel Levy at the Hebrew University of Jerusalem, Israel. The proposed work will combine the cascaded metasurface design approach introduced by the PI with the local oxidation of silicon technique initiated by Levy. Bringing together the design and fabrication approaches of the respective research groups will allow the realization of multilayered all-dielectric metasurfaces with tailored bianisotropic responses. The metasurfaces will consist of a cascade of rotated, subwavelength, high-contrast gratings that act as anisotropic layers with varying crystal axis orientations. The PI will develop synthesis techniques and head the simulation, while the Levy group will develop fabrication methods and perform optical characterization. To accurately and optimally design the proposed multilayer, all-dielectric metasurfaces, simulation and design will be closely tied to the fabrication. Fabricable geometries will be used, and the silicon geometries will be evaluated and optimized via simulation.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 11, 2018
- Source ID
- FA95501810466
Entities
People
- Anthony Grbic
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Michigan