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

被引：25

作者：

Liu, Gang L. ^{[1
]}

Kim, Jaeyoun

Lu, Yu

Lee, Luke P.

机构：

[1] Univ Calif Berkeley, Biomol Nanotechnol Ctr, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Bioengn, Berkeley, CA 94720 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 24期

关键词：

D O I：

10.1063/1.2388870

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

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. (c) 2006 American Institute of Physics.

引用

页数：3