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

Okamoto, Koichi and Vyawahare, Saurabh and Scherer, Axel (2006) Surface-plasmon enhanced bright emission from CdSe quantum-dot nanocrystals. Journal of the Optical Society of America B, 23 (8). pp. 1674-1678. ISSN 0740-3224 http://resolver.caltech.edu/CaltechAUTHORS:OKAjosab06

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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.

Item Type:	Article
Additional Information:	© 2006 Optical Society of America Received March 30, 2006; accepted April 4, 2006; posted April 21, 2006 (Doc. ID 69436) The authors acknowledge support from the Kavli Nanoscience Institute and the AFOSR under the Plasmon MURIFA9550-04-1-0434.
Subject Keywords:	surface plasmons; time-resolved spectroscopy
Record Number:	CaltechAUTHORS:OKAjosab06
Persistent URL:	http://resolver.caltech.edu/CaltechAUTHORS:OKAjosab06
Alternative URL:	http://www.opticsinfobase.org/abstract.cfm?URI=josab-23-8-1674
Usage Policy:	No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:	4815
Collection:	CaltechAUTHORS
Deposited By:	Archive Administrator
Deposited On:	08 Sep 2006
Last Modified:	26 Dec 2012 09:01

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