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The range of mid-infrared barrier photodetectors has been extended to cover the whole 3-5 μm atmospheric transmission window by researchers at Jet Propulsion Laboratory (JPL) at California Institute of Technology in the US. By incorporating self-assembled quantum dots into the absorber of the photodetector, they increased the cutoff wavelength from 4.2 to 6 μm and demonstrated an infrared response...
In the past decade, there has been active research on infrared detectors based on intersubband transitions in self-assembled quantum dots (QDs). In the past two years, at least four research groups have independently demonstrated focal plane arrays based on this technology. In this paper, the progress from the first raster scanned image obtained with a QD detector to the demonstration of a 640 512...
A mid-wavelength infrared (MWIR) and long-wavelength infrared (LWIR) 1024times1024 pixel quantum well infrared photodetector (QWIP) focal plane array has been demonstrated with excellent imagery. MWIR focal plane has given noise equivalent differential temperature (NETD) of 19 mK at 95 K operating temperature with f/2.5 optics at 300 K background and LWIR focal plane has given NEDT of 13 mK at 70...
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