Surface plasmon-quantum dot coupling from arrays of nanoholes

被引:59
作者
Brolo, AG
Kwok, SC
Cooper, MD
Moffitt, MG
Wang, CW
Gordon, R
Riordon, J
Kavanagh, KL
机构
[1] Univ Victoria, Dept Chem, Victoria, BC V8W 3V6, Canada
[2] Univ Victoria, Dept Elect & Comp Engn, Victoria, BC V8W 3P6, Canada
[3] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada
关键词
D O I
10.1021/jp054129c
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The coupling of semiconductor quantum dots (QDs) to the Surface plasmon (SP) modes of nanohole arrays in a metal film was demonstrated for the first time, showing enhancement in the spontaneous emission b 2 orders of magnitude. The SP-enhanced transmission resonances of the nanohole arrays were tuned around the photoluminescence (PL) peak of polystyrene-b-poly(acrylic acid) (PS-b-PAA)-stabilized cadmium sulfide (CdS) quantum dots (QDs) in contact with the arrays. As a result the overall PL from the SP-QD system was enhanced by 2 orders of magnitude, even after excluding the enhanced transmission of the nanohole array without the QDs. The maximum enhancement occurred when the resonance from the nanohole array matched the QD PL spectrum. Time-resolved PL measurements were used to estimate the relative contribution of different physical mechanisms to the enhanced spontaneous emission. The increased spontaneous emission in the SP-QD system is promising for prospective plasmonic light-emitting devices incorporating QDs.
引用
收藏
页码:8307 / 8313
页数:7
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