title: Confinement effects on optical phonons in polar tetrapod nanocrystals detected by resonant inelastic light scattering.
abstract: We investigated CdTe nanocrystal tetrapods of different sizes by resonant inelastic light scattering at room temperature and under cryogenic conditions. We observe a strongly resonant behavior of the phonon scattering with the excitonic structure of the tetrapods. Under resonant conditions we detect a set of phonon modes that can be understood as confined longitudinal-optical phonons, surface-optical phonons, and transverse-optical phonons in a nanowire picture.
authors.affiliation: National Nanotechnology Laboratory of CNR-INFM c/o Istituto Superiore Universitario di Formazione Interdisciplinare, Università di Lecce, Via per Arnesano, 73100 Lecce, Italy. roman.krahne@unile.it
authors.forename: Roman
authors.initials: R
authors.lastname: Krahne
authors.forename: Gerwin
authors.initials: G
authors.lastname: Chilla
authors.forename: Christian
authors.initials: C
authors.lastname: Schüller
authors.forename: Luigi
authors.initials: L
authors.lastname: Carbone
authors.forename: Stefan
authors.initials: S
authors.lastname: Kudera
authors.forename: Gianandrea
authors.initials: G
authors.lastname: Mannarini
authors.forename: Liberato
authors.initials: L
authors.lastname: Manna
authors.forename: Detlef
authors.initials: D
authors.lastname: Heitmann
authors.forename: Roberto
authors.initials: R
authors.lastname: Cingolani