title: Linearly polarized emission from colloidal semiconductor quantum rods.
abstract: Colloidal quantum rods of cadmium selenide (CdSe) exhibit linearly polarized emission. Empirical pseudopotential calculations predict that slightly elongated CdSe nanocrystals have polarized emission along the long axis, unlike spherical dots, which emit plane-polarized light. Single-molecule luminescence spectroscopy measurements on CdSe quantum rods with an aspect ratio between 1 and 30 confirm a sharp transition from nonpolarized to purely linearly polarized emission at an aspect ratio of 2. Linearly polarized luminescent chromophores are highly desirable in a variety of applications.
authors.affiliation: Department of Chemistry, University of California at Berkeley, Berkeley, CA 94720, USA.
authors.forename: J
authors.initials: J
authors.lastname: Hu
authors.lastname: Li Ls
authors.forename: W
authors.initials: W
authors.lastname: Yang
authors.forename: L
authors.initials: L
authors.lastname: Manna
authors.lastname: Wang Lw
authors.forename: A P
authors.initials: AP
authors.lastname: Alivisatos
mesh_terms: D019187:Cadmium Compounds / Q000737:chemistry; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003102:Colloids; D003460:Crystallization; D007834:Lasers; D008027:Light; D049449:Luminescence; D018613:Microscopy, Confocal; D008854:Microscopy, Electron; D008856:Microscopy, Fluorescence; D018036:Selenium Compounds / Q000737:chemistry; D012666:Semiconductors; D013057:Spectrum Analysis; D013696:Temperature
chemical_list: D019187:Cadmium Compounds; D003102:Colloids; D018036:Selenium Compounds; C058667:cadmium selenide