Responsivity spectra under different applied bias of QDIP with the bottom position of the delta-doping plane. The distance between the QD layer and the doping plane is 5 nm; the sheet hole density pB = 8 × 1011cm−2. The sample temperature is 90 K.
Yakimov et al. Nanoscale Research Letters 2012 7:494 doi:10.1186/1556-276X-7-494