A comparison of the performance of a photovoltaic HgCdTe detector with that of large area single pixel QWIPs for infrared radiometric applications

Combining the spectral information of Dual-Band images to enhance contrast and reveal details

“…A black body radiation source is used to get radiance at two different temperatures in the considered wavebands. The infrared detector is a photon counting QWIP detector, thus the output is linear to irradiance in a wide measurement region [6] proved in figure 1c. The calibration curve is based on a simple linear relation between the two calibration points.…”

The evaluation of a pyroelectric detector with a sprayed carbon multi-wall nanotube black coating in the infrared

“…The NPL infrared spectral responsivity measurement facility [12] was used to evaluate the relative spectral responsivity of the test detector in the 0.9 lm-24 lm wavelength range. This facility is based on a double grating monochromator of 0.25 m focal length, operating in the subtractive mode.…”

Near‐Room‐Temperature Mid‐Infrared Quantum Well Photodetector

“…Presently, mercury-cadmium-telluride is arguably the most important semiconductor alloy system for TEC temperature and high sensitivity infrared detectors; however, this material is expensive and typifi ed by substrate, lattice, surface, and interface instabilities that lead to large ( > 20%) spatial non-uniformity, and a non-linear responsivity. [ 1,2 ] Indium-antimonide detectors are likewise the most important semiconductor material for imaging, by virtue of their lower cost and high spatial uniformity but, typically, at the cost of material fragility, significant 1/f noise, and a need for cryogenic operation to achieve a competitive detectivity. In contrast, quantum well infrared photodetectors (QWIPs) show excellent infrared detection and imaging performance, but have a major limitation to their widespread use: they usually require cooling to cryogenic temperatures.…”