Photoluminescence and far-infrared absorption in Si-doped self-organized InAs quantum dots

Abstract

We report far-infrared absorption in directly doped self-organized InAs quantum dots. Photoluminescence spectra demonstrate a blue shift in peak intensity for increasing doping in the quantum dots. Far-infrared absorption measurements using a Fourier transform infrared spectrometer show absorption in the range of 13-18 μm for quantum dots with Al0.15Ga0.85As and GaAs as the barrier material. © 1997 American Institute of Physics.