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

doi:10.1016/j.spmi.2009.07.030

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

Physics and Astronomy

Research output: Contribution to journal › Article

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 language	English
Pages (from-to)	174-177
Number of pages	4
Journal	Superlattices and Microstructures
Volume	47
Issue number	1
DOIs	https://doi.org/10.1016/j.spmi.2009.07.030
Publication status	Published - 1 Jan 2010

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

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.",

author = "G Morello and {Della Sala}, F and Ludovico Carbone and L Manna and R Cingolani and {de Giorgi}, M",

year = "2010",

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T1 - Evidence for an internal field in CdSe/CdS nanorods by time resolved and single rod experiments

AU - Morello, G

AU - Della Sala, F

AU - Carbone, Ludovico

AU - Manna, L

AU - Cingolani, R

AU - de Giorgi, M

PY - 2010/1/1

Y1 - 2010/1/1

N2 - 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.

AB - 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.

U2 - 10.1016/j.spmi.2009.07.030

DO - 10.1016/j.spmi.2009.07.030

M3 - Article

VL - 47

SP - 174

EP - 177

JO - Superlattices and Microstructures

JF - Superlattices and Microstructures

SN - 0749-6036

IS - 1

ER -

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

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