Surface-Enhanced Emission from Single Semiconductor Nanocrystals

K. T. Shimizu, W. K. Woo, B. R. Fisher, H. J. Eisler, and M. G. Bawendi
Phys. Rev. Lett. 89, 117401 – Published 23 August 2002

Abstract

The fluorescence behavior of single CdSe(ZnS) core-shell nanocrystal (NC) quantum dots is dramatically affected by electromagnetic interactions with a rough metal film. Observed changes include a fivefold increase in the observed fluorescence intensity of single NCs, a striking reduction in their fluorescence blinking behavior, complete conversion of the emission polarization to linear, and single NC exciton lifetimes that are >103 times faster. The enhanced excited state decay process for NCs coupled to rough metal substrates effectively competes with the Auger relaxation process, allowing us to observe both charged and neutral exciton emission from these NC quantum dots.

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  • Received 19 March 2002

DOI:https://doi.org/10.1103/PhysRevLett.89.117401

©2002 American Physical Society

Authors & Affiliations

K. T. Shimizu, W. K. Woo, B. R. Fisher, H. J. Eisler, and M. G. Bawendi

  • Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139

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Issue

Vol. 89, Iss. 11 — 9 September 2002

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