Thin film emitter-absorber apparatus and methods

Details Thin film emitter-absorber apparatus and methods Thin film emitter-absorber apparatus and methods

2011-07-05

2011-07-05

Gregory, Bernarr E (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

With particular geometric configuration

C342S001000, C342S005000, C342S013000, C342S052000, C342S053000, C342S175000

Reexamination Certificate

active

07973696

ABSTRACT:
Methods and apparatus for providing a tunable absorption-emission band in a wavelength selective device are disclosed. A device for selectively absorbing incident electromagnetic radiation includes an electrically conductive surface layer including an arrangement of multiple surface elements. The surface layer is disposed at a nonzero height above a continuous electrically conductive layer. An electrically isolating intermediate layer defines a first surface that is in communication with the electrically conductive surface layer. The continuous electrically conductive backing layer is provided in communication with a second surface of the electrically isolating intermediate layer. When combined with an infrared source, the wavelength selective device emits infrared radiation in at least one narrow band determined by a resonance of the device. In some embodiments, the device includes a control feature that allows the resonance to be selectively modified. The device has broad applications including gas detection devices and infrared imaging.

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