Emission properties of single CdSe/ZnS quantum dots close to a dielectric interface

Autor:	J.-P. Hermier, Laurent Coolen, Xavier Brokmann, Maxime Dahan
Rok vydání:	2005
Předmět:	business.industry Chemistry Degenerate energy levels General Physics and Astronomy Nanoparticle Dielectric Radiation pattern Dipole Quantum dot Radiative transfer Optoelectronics Quantum efficiency Physical and Theoretical Chemistry business
Zdroj:	Chemical Physics. 318:91-98
ISSN:	0301-0104
DOI:	10.1016/j.chemphys.2005.06.032
Popis:	We study the effect of a dielectric interface on the emission of individual semiconductor quantum dots (QDs). By means of a simple experimental method, a single nanoparticle can be placed successively close and far from an interface, enabling a direct comparison of its fluorescence properties in both cases. We analyze the modifications of both the radiation pattern and the radiative lifetime of individual QDs by a glass–air interface. We discuss the role of their degenerate two-dimensional dipole in the emission pattern and show how a simple dielectric interface can affect the collection efficiency. Finally, we present a simple method to determine the quantum efficiency of the emitting state at the single molecule level.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::94f81383d4d68fca08b76903234aa2b9 https://doi.org/10.1016/j.chemphys.2005.06.032 Zobrazit plný text záznamu Full Text from ScienceDirect