InGaAs/AlAsSb quantum cascade detectors operating in the near infrared

The authors report on short-wavelength In0.53Ga0.47As/AlAs0.56Sb0.44 quantum cascade detectors (QCDs). At room temperature, one device detects at 505 meV (2.46 mu m) with a responsivity of 2.57 mA/W, while a second QCD is sensitive at 580 meV (2.14 mu m) with a responsivity of 0.32 mA/W.