Photoluminescence of CdSe self-assembled quantum dots: Experiments and models

Autor:	Howard E. Jackson, Jacek K. Furdyna, Leigh M. Smith, Jan M. Yarrison-Rice, Margaret Dobrowolska, Reca Jones
Rok vydání:	2003
Předmět:	Physics Photoluminescence Condensed matter physics Quantum dot Aperture Monte Carlo method Emission spectrum Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Molecular physics Spectral line Self assembled Electronic states
Zdroj:	Physical Review B. 68
ISSN:	1095-3795 0163-1829
DOI:	10.1103/physrevb.68.125333
Popis:	We report on nonresonant nanophotoluminescence spectra of CdSe/ZnSe self-assembled quantum dots obtained through a series of apertures ranging in area from 21.8 to 0.006 \ensuremath{\mu}${\mathrm{m}}^{2}$. Spectra exhibit narrow peaks with \ensuremath{\sim}250-\ensuremath{\mu}eV linewidths superimposed on a broad feature with a \ensuremath{\sim}40-meV width. The broad feature is observed even at the smallest aperture sizes. Monte Carlo simulations are used to investigate the roles of both the broad and sharp peaks in the CdSe dot emission spectra. The spectra and a quantitative analysis support the physical picture of a self-assembled quantum dot with two distinct electronic states.
Databáze:	OpenAIRE
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