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  • Title: Single InAs quantum dot grown at the junction of branched gold-free GaAs nanowire.
    Author: Yu Y, Li MF, He JF, He YM, Wei YJ, He Y, Zha GW, Shang XJ, Wang J, Wang LJ, Wang GW, Ni HQ, Lu CY, Niu ZC.
    Journal: Nano Lett; 2013 Apr 10; 13(4):1399-404. PubMed ID: 23464836.
    Abstract:
    We report a new type of single InAs quantum dot (QD) embedded at the junction of gold-free branched GaAs/AlGaAs nanowire (NW) grown on silicon substrate. The photoluminescence intensity of such QD is ~20 times stronger than that from randomly distributed QD grown on the facet of straight NW. Sharp excitonic emission is observed at 4.2 K with a line width of 101 μeV and a vanishing two-photon emission probability of g(2)(0) = 0.031(2). This new nanostructure may open new ways for designing novel quantum optoelectronic devices.
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