title: Quantum Dot-Like Behavior of Compositional Fluctuations in AlGaN Nanowires.
abstract: We report on the structural and optical properties of AlxGa(1-x)N nanowire sections grown by plasma-assisted molecular beam epitaxy on GaN nanowire bases used as a template. Based on a combination of scanning electron microscopy, microphotoluminescence, time-resolved microphotoluminescence, and photon correlation experiments, it is shown that compositional fluctuations in AlxGa(1-x)N sections associated with carrier localization optically behave as quantum dots. Moreover, most of the micro-optical properties of such fluctuations are demonstrated to be very little dependent on kinetic growth parameters such as AlxGa(1-x)N growth temperature and AlN molar fraction in the alloy, which govern the macrostructural properties of AlxGa(1-x)N sections.
authors.affiliation: Univ. Grenoble Alpes , F-38000 Grenoble, France.|CEA, INAC-PHELIQS, "Nanophysics and Semiconductors" Group, F-38000 Grenoble, France.
authors.forename: M
authors.initials: M
authors.lastname: Belloeil
authors.affiliation: Univ. Grenoble Alpes , F-38000 Grenoble, France.|CEA, INAC-PHELIQS, "Nanophysics and Semiconductors" Group, F-38000 Grenoble, France.
authors.forename: B
authors.initials: B
authors.lastname: Gayral
authors.affiliation: Univ. Grenoble Alpes , F-38000 Grenoble, France.|CEA, INAC-PHELIQS, "Nanophysics and Semiconductors" Group, F-38000 Grenoble, France.
authors.forename: B
authors.initials: B
authors.lastname: Daudin
mesh_terms: D017607:Aluminum Compounds / Q000737:chemistry*; D005708:Gallium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry / Q000648:ultrastructure; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D055095:Optics and Photonics; D045663:Quantum Dots / Q000737:chemistry* / Q000648:ultrastructure
chemical_list: D017607:Aluminum Compounds; C513700:aluminum gallium nitride; D005708:Gallium
keywords: AlGaN nanowire; antibunching; compositional fluctuation; photon correlation; quantum dot; time-resolved microphotoluminescence