title: Probing quantum confinement within single core-multishell nanowires.
abstract: Theoretically core-multishell nanowires under a cross-section of hexagonal geometry should exhibit peculiar confinement effects. Using a hard X-ray nanobeam, here we show experimental evidence for carrier localization phenomena at the hexagon corners by combining synchrotron excited optical luminescence with simultaneous X-ray fluorescence spectroscopy. Applied to single coaxial n-GaN/InGaN multiquantum-well/p-GaN nanowires, our experiment narrows the gap between optical microscopy and high-resolution X-ray imaging and calls for further studies on the underlying mechanisms of optoelectronic nanodevices.
authors.affiliation: European Synchrotron Radiation Facility, 38043-Grenoble, France. gmartine@esrf.fr
authors.forename: Gema
authors.initials: G
authors.lastname: Martínez-Criado
authors.forename: Alejandro
authors.initials: A
authors.lastname: Homs
authors.forename: Benito
authors.initials: B
authors.lastname: Alén
authors.forename: Juan A
authors.initials: JA
authors.lastname: Sans
authors.forename: Jaime
authors.initials: J
authors.lastname: Segura-Ruiz
authors.forename: Alejandro
authors.initials: A
authors.lastname: Molina-Sánchez
authors.forename: Jean
authors.initials: J
authors.lastname: Susini
authors.forename: Jinkyoung
authors.initials: J
authors.lastname: Yoo
authors.forename: Gyu-Chul
authors.initials: GC
authors.lastname: Yi