Signal enhancement of surface plasmon-coupled directional emission by a conical mirror

被引：26
|
作者：
Smith, Derek S.
Kostov, Yordan
Rao, Govind [1 ]
机构：
[1] Univ Maryland Baltimore Cty, Ctr Adv Sensor Technol, Baltimore, MD 21250 USA
来源：
APPLIED OPTICS | 2008年 / 47卷 / 28期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1364/AO.47.005229
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A simple strategy for increasing the collection efficiency of surface plasmon-coupled emission (SPCE) is demonstrated. SPCE is a near-field phenomenon occurring when excited fluorophores are in close proximity to a subwavelength metal film. The energy of the fluorophores induces surface plasmons that radiate the coupled energy at highly specific angles. In an attempt to maximize the collected emission, a conical mirror was placed around the coupling prism. The result was a nearly 500 fold enhancement over the free space signal as detected from a single point from a poly(vinyl alcohol) layer doped with ruthenium. Coupling this large enhancement with LED excitation could lead to the development of inexpensive, handheld fluorescent devices with high sensitivity. (C) 2008 Optical Society of America
引用
收藏
页码：5229 / 5234
页数：6
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