Absorption Filters for Wavelength Tuning and Finesse Switching of Long Wave Infrared Thermal Detectors

A review is made of the physics and technology of spectrally selective thermal detectors, especially those operating at non-cryogenic temperatures. The background radiation noise fluctuations are rederived for arbitrary spectral characteristics. Infrared absorption due to phonons and free carriers is discussed followed by a review of published works on artificial infrared absorption materials such as patterned grids, nanoparticles, plasmonic structures, metamaterials and others. Subsequently, the literature of the spectral characteristics of broadband thermal detectors and spectrally selective thermal detectors is reviewed. Finally, the authors speculate on the directions that future research and development in the area will take regarding architectures, sensitivity and spectral characteristics.

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Spectral selectivity in infrared thermal detection

Talghader

2012

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Absorption Filters for Wavelength Tuning and Finesse Switching of Long Wave Infrared Thermal Detectors

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Spectral selectivity in infrared thermal detection

Spectral selectivity in infrared thermal detection

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