Metamaterial metal-based bolometers

We demonstrate metamaterial metal-based bolometers, which take advantage of resonant absorption in that a spectral and/or polarization filter can be built into the bolometer. Our proof-of-principle gold-nanostructure-based devices operate around 1.5 \mum wavelength and exhibit room-temperature time...

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Published inarXiv.org
Main Authors Niesler, Fabian B P, Gansel, Justyna K, Fischbach, Sarah, Wegener, Martin
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.04.2012
Subjects
Bolometers
Gold
Gratings (spectra)
Light levels
Metamaterials
Octaves
Optical polarization
Physics - Optics
Prisms
Spectrometers
Thermal noise
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Summary:We demonstrate metamaterial metal-based bolometers, which take advantage of resonant absorption in that a spectral and/or polarization filter can be built into the bolometer. Our proof-of-principle gold-nanostructure-based devices operate around 1.5 \mum wavelength and exhibit room-temperature time constants of about 134 \mus. The ultimate detectivity is limited by Johnson noise, enabling room-temperature detection of 1 nW light levels within 1 Hz bandwidth. Graded bolometer arrays might allow for integrated spectrometers with several octaves bandwidth without the need for gratings or prisms and for integrated polarization analysis without external polarization optics.
ISSN:2331-8422
DOI:10.48550/arxiv.1204.0966