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- W1981036782 abstract "Photoluminescence and structural properties of self-assembled InAs quantum dots, grown on AlyGa1—yAs, are studied for y = 0, 0.3, and 0.5. A maximum blue shift of 150 meV for the ground state emission energy is determined with increasing y for the samples as grown. Increased surface density and size inhomogeneity is observed for growth on AlGaAs compared to growth on GaAs. Rapid thermal annealing at temperatures ranging from 550 to 850 °C is used to further increase the ground state emission energy with respect to the as grown samples. We find a shift up to a maximum emission energy of 1.9 eV for InAs quantum dots (QDs) embedded in Al0.3Ga0.7As compared to 1.4 eV for GaAs matrix material. To combine the higher spectral shift by annealing for InAs QDs embedded in AlGaAs with the lower dot density for the growth on GaAs, favored for single dot spectroscopy, we investigated InAs QDs grown on AlGaAs separated by 2 ML GaAs. For these samples we observe a maximum shift by annealing up 1.4 eV and intense room temperature PL." @default.
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- W1981036782 date "2001-03-01" @default.
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- W1981036782 title "Photoluminescence and AFM Studies on Blue Shifted InAs/AlyGa1?yAs Quantum Dots" @default.
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- W1981036782 doi "https://doi.org/10.1002/1521-3951(200103)224:1<47::aid-pssb47>3.0.co;2-t" @default.
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