InP-based quantum-well infrared photodetectors

摘要

Abstract: We demonstrate the first long wavelength quantum well infrared photodetectors (QWIPs) using lattice matched n-doped In$-0.47$/As/InP and n-doped 1.3 $mu@m InGaAsP/InP materials systems. The responsivity of In$-0.52$/Ga$-0.47$/As/InP detectors has been found to be larger than that for similar GaAs/Al$-x$/Ga$-1 $MIN x$/As detectors. In addition we demonstrate the first p-doped In$-0.53$/Ga$-0.47$/As/InP QWIPs. This detector has the shortest wavelength response, $lambda@$-p$/ $EQ 2.7 $mu@m, ever achieved in a QWIP and operates at normal incidence.!39