부산대학교 도서관

Normal incidence InAs/InGaAs dots-in-a-well (DWELL) detectors are reported in which the peak operating wavelength was tailored from 7.2 m to 11 m using heterostructure engineering of the DWELL structure. Using an optimized design, a detector with a spectral response spanning the long-wave infrared (LWIR) atmospheric window (8-12 m) is obtained. Spectral response peaks were observed at p = 10.3 m and 11.3 m under positive and negative bias, respectively. These peaks are attributed to bound-to-bound transitions from the InAs quantum dot to the InGaAs well.