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- W3104419646 abstract "The optical properties of a stack of GaN/AlN quantum discs (QDiscs) in a GaN nanowire have been studied by spatially resolved cathodoluminescence (CL) at the nanoscale (nanoCL) using a scanning transmission electron microscope (STEM) operating in spectrum imaging mode. For the electron beam excitation in the QDisc region, the luminescence signal is highly localized, with spatial extent as low as 5 nm, due to the high band gap difference between GaN and AlN. This allows the discrimination between the emission of neighbouring QDiscs and evidencing the presence of lateral inclusions, about 3 nm thick and 20 nm long rods (quantum rods, QRods), grown unintentionally on the nanowire sidewalls. These structures, also observed by STEM dark-field imaging, are proved to be optically active in nanoCL, emitting at similar, but usually shorter, wavelengths with respect to most QDiscs." @default.
- W3104419646 created "2020-11-23" @default.
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- W3104419646 date "2012-10-22" @default.
- W3104419646 modified "2023-10-16" @default.
- W3104419646 title "Visualizing highly localized luminescence in GaN/AlN heterostructures in nanowires" @default.
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- W3104419646 doi "https://doi.org/10.1088/0957-4484/23/45/455205" @default.
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