title: Zero-phonon linewidth in CdSe/ZnS core/shell nanorods.
abstract: High-resolution spectral hole-burning studies of CdSe/ZnS core/shell nanorods reveal a sharp zero-phonon line, with a line width dependent on the measurement time scale. The zero-phonon line width is attributed to contributions from radiative decay, spectral diffusion induced by surface electric field fluctuations, and phonon-assisted migration of excitons localized in the nanorods. A decoherence rate as small as 4.5 GHz has been observed, when the effects of spectral diffusion are suppressed in the spectral hole-burning measurement. Comparison between zero-phonon line widths in nanorods and spherical nanocrystals also elucidates important differences in the decoherence process between the one- and zero-dimensional nanostructures.
authors.affiliation: Department of Physics, University of Oregon, Eugene, Oregon 97403, USA.
authors.forename: Sasha
authors.initials: S
authors.lastname: Tavenner-Kruger
authors.forename: Young-Shin
authors.initials: YS
authors.lastname: Park
authors.forename: Mark
authors.initials: M
authors.lastname: Lonergan
authors.forename: Ulrike
authors.initials: U
authors.lastname: Woggon
authors.forename: Hailin
authors.initials: H
authors.lastname: Wang
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry*; D008027:Light; D008422:Materials Testing; D043942:Nanotubes / Q000737:chemistry*; D010777:Photochemistry / Q000379:methods*; D012542:Scattering, Radiation; D018036:Selenium Compounds / Q000737:chemistry*; D012666:Semiconductors; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D019187:Cadmium Compounds; D018036:Selenium Compounds; D017967:Zinc Compounds; C058667:cadmium selenide; C044696:zinc selenide