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

Koichi Okamoto; Saurabh Vyawahare; Axel Scherer

doi:10.1364/JOSAB.23.001674

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

Koichi Okamoto, Saurabh Vyawahare, Axel Scherer

Department of Fundamental Organic Chemistry

Research output: Contribution to journal › Article › peer-review

135 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 language	English
Pages (from-to)	1674-1678
Number of pages	5
Journal	Journal of the Optical Society of America B: Optical Physics
Volume	23
Issue number	8
DOIs	https://doi.org/10.1364/JOSAB.23.001674
Publication status	Published - Aug 2006

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Atomic and Molecular Physics, and Optics

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title = "Surface-plasmon enhanced bright emission from CdSe quantum-dot nanocrystals",

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.",

author = "Koichi Okamoto and Saurabh Vyawahare and Axel Scherer",

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AU - Okamoto, Koichi

AU - Vyawahare, Saurabh

AU - Scherer, Axel

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N2 - 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.

AB - 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.

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