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Title: Methods and apparatus for broadband angular selectivity of electromagnetic waves

A filter to transmit incident radiation at a predetermined incidence angle includes a plurality of photonic crystal structures disposed substantially along a surface normal direction of the filter. The photonic crystal structure includes a multilayer cell that comprises a first layer having a first dielectric permittivity, and a second layer having a second dielectric permittivity different from the first dielectric permittivity. The first layer and the second layer define a Brewster angle substantially equal to the predetermined incidence angle based on the first dielectric permittivity and the second permittivity. Each photonic crystal structure in the plurality of photonic crystal structures defines a respective bandgap, and the respective bandgaps of the plurality of photonic crystal structures, taken together, cover a continuous spectral region of about 50 nm to about 100 mm.
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Issue Date:
OSTI Identifier:
Massachusetts Institute of Technology (Cambridge, MA) EFRC
Patent Number(s):
Application Number:
Contract Number:
FG02-09ER46577; SC0001299
Resource Relation:
Patent File Date: 2015 Feb 24
Research Org:
Massachusetts Institute of Technology, Cambridge, MA (United States)
Sponsoring Org:
Country of Publication:
United States

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