【摘 要】
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In this chapter,we discuss the epitaxial growth of self-assembled quantum dots (QDs) in GaAs nanowires (NWs) and the characteristics of their single-photon emis
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In this chapter,we discuss the epitaxial growth of self-assembled quantum dots (QDs) in GaAs nanowires (NWs) and the characteristics of their single-photon emissions.We demonstrate Ga droplet-induced gold-free vapor-liquid-solid growth of hexagonal GaAs/AlGaAs core-shell NWs,branched GaAs NWs and tailored nanostructured morphologies on the NW facets.Particularly,we show two new types of QD-in-NW systems:one is a single InAs QD formed at the comer of a branched GaAs NW,and the other is a single GaAs QD formed on the NW facet.Sharp excitonic emission spectral lines are observed with vanishing two-photon emission probability.Furthermore,a single GaAs QD is achieved at the site of a single AlGaAs quantum ring (QR) on the NW facet.In addition,these NW-based single QDs are in-situ probed and integrated with single-mode optical fibers to achieve all-fiber-output single-photon sources for potential application in quantum integrated networks.
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