Abstract:
A photodetector heterostructure based on AlInSb/InSb was grown by molecular-beam epitaxy. Mesostructures of different diameters were fabricated. The temperature dependence of the dark current was measured. It was demonstrated that the built-in barrier blocks the flow of majority charge carriers, thus reducing the dark-current density (relative to that for a pin structure based on InSb). The measured dependence of the dark current on the mesostructure size revealed that the bulk current component prevails over the surface one.
Keywords:InSb, nBn detector, dark current, molecular-beam epitaxy, IR photodetector.
Citation:
M. A. Sukhanov, A. K. Bakarov, D. Yu. Protasov, K. S. Zhuravlev, “AlInSb/InSb heterostructures for IR photodetectors grown by molecular-beam epitaxy”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 46:4 (2020), 3–6; Tech. Phys. Lett., 46:2 (2020), 154–157