Open access
Date
2008-09Type
- Journal Article
ETH Bibliography
yes
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Abstract
Mid-infrared detectors that are sensitive only in a tunable narrow spectral band are presented. They are based on the Resonant Cavity Enhanced Detector (RCED) principle and employing a thin active region using IV-VI narrow gap semiconductor layers. A Fabry-Pérot cavity is formed by two mirrors. The active layer is grown onto one mirror, while the second mirror can be displaced. This changes the cavity length thus shifting the resonances where the detector is sensitive. Using electrostatically actuated MEMS micromirrors, a very compact tunable detector system has been fabricated. Mirror movements of more than 3 μm at 30V are obtained. With these mirrors, detectors with a wavelength tuning range of about 0.7 μm have been realized. Single detectors can be used in mid-infrared micro spectrometers, while a detector arrangement in an array makes it possible to realize Adaptive Focal Plane Arrays (AFPA). Show more
Permanent link
https://doi.org/10.3929/ethz-b-000011684Publication status
publishedExternal links
Journal / series
SensorsVolume
Pages / Article No.
Publisher
MDPISubject
RCED; MEMS; micromirror; Fabry-Perot; mid infrared; micro spectrometerOrganisational unit
02498 - Ott H. R., Dünnschichtphysik03307 - Dual, Jürg (emeritus) / Dual, Jürg (emeritus)
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ETH Bibliography
yes
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