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Metallic dielectric photonic crystals and methods of fabrication

United States Patent

December 20, 2016
View the Complete Patent at the US Patent & Trademark Office
A metallic-dielectric photonic crystal is formed with a periodic structure defining a plurality of resonant cavities to selectively absorb incident radiation. A metal layer is deposited on the inner surfaces of the resonant cavities and a dielectric material fills inside the resonant cavities. This photonic crystal can be used to selectively absorb broadband solar radiation and then reemit absorbed radiation in a wavelength band that matches the absorption band of a photovoltaic cell. The photonic crystal can be fabricated by patterning a sacrificial layer with a plurality of holes, into which is deposited a supporting material. Removing the rest of the sacrificial layer creates a supporting structure, on which a layer of metal is deposited to define resonant cavities. A dielectric material then fills the cavities to form the photonic crystal.
Chou; Jeffrey Brian (Walnut Creek, CA), Kim; Sang-Gook (Wayland, MA)
Massachusetts Institute of Technology (Cambridge, MA)
14/ 478,381
September 5, 2014
GOVERNMENT SUPPORT This invention was made with government support under Contract Nos. DE-SC0001299 and DE-FG02-09ER46577 awarded by the US Department of Energy. The government has certain rights in the invention.