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Adopting mask during proton implantation, we obtain several areas with different proton implantation in a single wafer of GaAs/AlGaAs asymmetrically coupled double quantum wells (ACDQW) grown by MBE, and investigated the characteristics using photoluminescence (PL) and photo-modulated reflectance (PR) spectroscopy. Without rapid thermal annealing, the maximum transition energy shift of 82meV in a...
We have studied the optical properties of surface quantum wells with different width of wells (5 nm and 10 nm) by in-situ photo-modulated reflectance spectroscopy on molecular beam epitaxy (MBE) system. The single surface quantum well (SQW) is confined by the vacuum on one side and by Al 0.3 Ga 0.7 As barrier on the other side. In experiments, we have observed clearly the transitions...
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