United States of America As Represented by the Secretary of the Air Force

Evan Smith

Justin W Cleary

Robert E Peale

Ivan Avrutsky

Joshua R Hendrickson

Shivashankar Vangala

Janardan Nath

Ricky D Gibson, Jr

A transmission filter apparatus is provided that includes: (i) a substrate to serve as a foundation for the apparatus; (ii) a layer containing resonant dielectric cavities separated by conductive regions. The dimensions and design of the dielectric cavities, thickness of the layer, and substrate, dielectric and conductive materials are chosen to achieve resonant transmission of selected wavelengths. In a particular one or more embodiments, the layer is one dimensional, i.e. you have dielectric cavities along one axis in the plane that are comparatively infinity long in the parallel plane. In a particular one or more embodiments, the layer is two dimensional, i.e. you have dielectric cavities along both axis in the plane. The dimensions in each plane may or may not be equal. In a specific one or more embodiments, the dielectric cavities are terminated on the top and/or bottom by thin metal films with small apertures or tapers.

Angle- and polarization-insensitive narrow-band optical filters using resonant cavities

A wavelength selective bolometer includes a substrate configured to serve as a foundation for the apparatus and a thermal isolation gap established between the substrate and subsequent solid material layers. A conducting ground plane layer is disposed above the thermal isolation gap, and a first dielectric layer is mated to a top surface of the conducting ground plane. A temperature sensing material layer is mated to a top surface of the first dielectric layer, and a plurality of interconnects is placed in electrical communication with the temperature sensing material layer. A second dielectric layer is mated to a top surface of the temperature sensing material, and at least one conductive element is mated to a top surface of the second dielectric layer. The dimensions of the conductive element and other variables are chosen to achieve resonant absorption of selected wavelengths of radiation incident thereupon.

Wavelength-selective thermal detection apparatus and methods

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Dayton, OH, United States of America

Evan Smith