Surface-plasmon enhanced bright emission from CdSe quantum-dot nanocrystals

Koichi Okamoto, Saurabh Vyawahare, Axel Scherer

Research output: Contribution to journalArticlepeer-review

137 Citations (Scopus)

Abstract

We obtained very bright light emission from CdSe quantum dots (QDs) by using the surface-plasmon (SP) coupling technique. 23-fold enhanced photoluminescence (PL) intensities and two-fold increased PL decay rates are observed when the QDs are located on evaporated gold films. This enhancement is not effective for CdSe cores with ZnS shells (ZnS/CdSe). The reason for this difference can be explained by using the SP dispersion diagram and by considering the SP coupling mechanism. We discuss the inherent merits and demerits of this technique to increase the emission efficiency. This technique will enable high-speed and efficient light emission for optically as well as electrically pumped light emitters.

Original languageEnglish
Pages (from-to)1674-1678
Number of pages5
JournalJournal of the Optical Society of America B: Optical Physics
Volume23
Issue number8
DOIs
Publication statusPublished - Aug 2006

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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