Fundamental limits on the Detectivity of IR Photodetectors for Spectral Sensing
Markus Baier
https://tugraz.webex.com/tugraz/j.php?MTID=mdcdb6c1cabf911c39e820cae6191f94e
11:15 - 12:15 Wednesday 22 March 2023 PH1150 The extended-SWIR wavelength band (1.0 - 2.4 μm) exhibits a performance gap for infrared detectors, although this band is of high interest for various applications. Particularly, room-temperature operated detectors for IR spectroscopy show high market potential. Since so far most IR detectors need cooling for proper operation.
GaInAsSb (GIAS)-based photodetectors grown lattice matched to GaSb enable uncooled sensing in the e-SWIR. The potential of these PDs for multispectral reflection microspectrometers is evaluated. Especially, the detectivity of a photodetector array is investigated - accompanied by a comprehensive noise study. Further, the fundamental limit in detectivity of this technology is assessed. Finally, a more general outlook on novel use cases (chemical detection, health monitoring) is presented.
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Institute of Solid State Physics
