title: Single nanowire extinction spectroscopy.
abstract: Here we show the first direct extinction spectra of single one-dimensional (1D) semiconductor nanostructures obtained at room temperature utilizing a spatial modulation approach. (1) For these materials, ensemble averaging in conventional extinction spectroscopy has limited our understanding of the interplay between carrier confinement and their electrostatic interactions. (2-4) By probing individual CdSe nanowires (NWs), we have identified and assigned size-dependent exciton transitions occurring across the visible. In turn, we have revealed the existence of room temperature 1D excitons in the narrowest NWs.
authors.affiliation: Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States.
authors.forename: Jay
authors.initials: J
authors.lastname: Giblin
authors.forename: Felix
authors.initials: F
authors.lastname: Vietmeyer
authors.forename: Matthew P
authors.initials: MP
authors.lastname: McDonald
authors.forename: Masaru
authors.initials: M
authors.lastname: Kuno
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D053770:Nanowires; D018036:Selenium Compounds / Q000737:chemistry; D013057:Spectrum Analysis / Q000379:methods*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; C058667:cadmium selenide