Evidence for an internal field in CdSe/CdS nanorods by time resolved and single rod experiments

G Morello, F Della Sala, Ludovico Carbone, L Manna, R Cingolani, M de Giorgi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In this contribution we report on an optical nonlinearity featuring colloidal seeded grown CdSe/CdS nanorods (NRs). It consists of a photoluminescence (PL) blueshift of single rod spectra with increasing laser power and a transient, power-dependent redshift of the spectra studied by time resolved PL measurement, strictly related to the multicarrier scattering occurring at high excitation density. We attribute this nonlinearity to a photo-induced screening of an internal field, originating from the piezoelectric polarization induced at the core/shell interface.
Original languageEnglish
Pages (from-to)174-177
Number of pages4
JournalSuperlattices and Microstructures
Volume47
Issue number1
DOIs
Publication statusPublished - 1 Jan 2010

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