Kavli Affiliate: Andrei Faraon
| First 5 Authors: Gregory Roberts, Conner Ballew, Tianzhe Zheng, Juan C. Garcia, Sarah Camayd-Muñoz
| Summary:
Modern imaging systems can be enhanced in efficiency, compactness, and
application through introduction of multilayer nanopatterned structures for
manipulation of light based on its fundamental properties. High transmission
efficiency multispectral imaging is surprisingly elusive due to the commonplace
use of filter arrays which discard most of the incident light. Further, most
cameras do not leverage the wealth of information in polarization and spatial
degrees of freedom. Optical metamaterials can respond to these electromagnetic
properties but have been explored primarily in single-layer geometries,
limiting their performance and multifunctional capacity. Here we use advanced
two-photon lithography to realize multilayer scattering structures that achieve
highly nontrivial optical transformations intended to process light just before
it reaches a focal plane array. Computationally optimized multispectral and
polarimetric sorting devices are fabricated with submicron feature sizes and
experimentally validated in the mid-infrared. A final structure shown in
simulation redirects light based on its angular momentum. These devices
demonstrate that with precise 3-dimensional nanopatterning, one can directly
modify the scattering properties of a sensor array to create advanced imaging
systems.
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