Colloidal semiconductor nanocrystals are among the best candidates for realizing a nano-structured single photon source at room temperature. In this paper we present a new and efficient optical method to assess the quality of a sample of nanocrystals as single-photon emitters, by an ensemble measurement of photoluminescence. We relate the ensemble photoluminescence measurements to the photon statistics of single emitters by a simple theoretical model. As an example we compare two different kinds of CdSe/CdS dot-in-rods, showing a similar degree of single photon emission when observed on a selection of single nanocrystals. The results are compared with anti-bunching measurements realized on single nanocrystals of the two kinds.

An ensemble-based method to assess the quality of a sample of nanocrystals as single photon emitters / S. Vezzoli, S. Shojaii, S. Cialdi, D. Cipriani, F. Castelli, M. G. A. Paris, L. Carbone, P. Davide Cozzoli, E. Giacobino, A. Bramati. - In: OPTICS COMMUNICATIONS. - ISSN 0030-4018. - 300(2013 Mar), pp. 215-219.

An ensemble-based method to assess the quality of a sample of nanocrystals as single photon emitters

S. Vezzoli;S. Shojaii;S. Cialdi;D. Cipriani;F. Castelli;M. G. A. Paris;
2013-03

Abstract

Colloidal semiconductor nanocrystals are among the best candidates for realizing a nano-structured single photon source at room temperature. In this paper we present a new and efficient optical method to assess the quality of a sample of nanocrystals as single-photon emitters, by an ensemble measurement of photoluminescence. We relate the ensemble photoluminescence measurements to the photon statistics of single emitters by a simple theoretical model. As an example we compare two different kinds of CdSe/CdS dot-in-rods, showing a similar degree of single photon emission when observed on a selection of single nanocrystals. The results are compared with anti-bunching measurements realized on single nanocrystals of the two kinds.
Nanomaterials; Photo-luminescence; Quantum dot devices
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/225224
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