Fluorescence enhancement of quantum dots enclosed in Au nanopockets with subwavelength aperture

Gang L. Liu, Jaeyoun Kim, Yu Lu, Luke P. Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The authors observed strong fluorescence (FL) enhancement from CdSe quantum dots (QDs) partially encapsulated in a smooth Au film with subwavelength apertures. So far, the fluorescence of QDs placed on smooth metallic surfaces has been mostly quenched unless the surface was roughened in nanoscale. The pocketed QD FL emitted through the nanoaperture exhibited up to fivefold enhancement when compared with those from QDs on plain Au or glass surfaces. The enhancement depends strongly on the film thickness and becomes maximized at 50 nm. This study shows that the dependence may be closely related to the surface plasmon-polariton characteristics of the Au layer.

Original languageEnglish (US)
Article number241118
JournalApplied Physics Letters
Volume89
Issue number24
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint

Dive into the research topics of 'Fluorescence enhancement of quantum dots enclosed in Au nanopockets with subwavelength aperture'. Together they form a unique fingerprint.

Cite this