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Subwavelength plasmonic absorbers for spectrally selective resonant infrared detectors
- Source :
- IEEE SENSORS 2014 Proceedings.
- Publication Year :
- 2014
- Publisher :
- IEEE, 2014.
-
Abstract
- This work presents the first resonant infrared (IR) detectors with integrated nanostructured subwavelength plasmonic gratings designed to selectively absorb long wavelength infrared (LWIR) radiation. The resonant detectors are the smallest in size demonstrated so far. The absorbers are optimized for a spectral wavelength of 10.15 μm and experimentally demonstrate an absorbance of 46% with a Full Width at Half Maximum (FWHM) of 1.7 μm. The absorbed thermal energy causes a fast (sub-millisecond) proportional change in the frequency of the resonator. The combination of resonant IR detectors with integrated plasmonic absorbers enables spectrally selective IR detectors. Each detector in the array can be optimized for different wavelengths, thus enabling a multi-spectral array for IR spectroscopy and multispectral thermal imaging. Keywords—micromechanical resonator, IR detector, plasmonics, metamaterial.
- Subjects :
- Materials science
Physics::Instrumentation and Detectors
business.industry
Infrared
Detector
Physics::Optics
Infrared spectroscopy
Metamaterial
Astrophysics::Cosmology and Extragalactic Astrophysics
Full width at half maximum
Resonator
Wavelength
Optics
Optoelectronics
High Energy Physics::Experiment
business
Astrophysics::Galaxy Astrophysics
Plasmon
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- IEEE SENSORS 2014 Proceedings
- Accession number :
- edsair.doi...........496a18522d9db39b0efba989a1876366