Off-resonance surface plasmon enhanced spontaneous emission from CdTe quantum dots
Off-resonance surface plasmon enhanced spontaneous emission from CdTe quantum dots
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DOI：
10.1063/1.2422906
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发表时间：
2006-12-18
影响因子：
4
通讯作者：
Eychmueller, A.
中科院分区：
文献类型：
--
作者：
Komarala, Vamsi K.;Rakovich, Yury P.;Eychmueller, A.
在共振和非共振条件下，研究了金纳米颗粒单分子膜上的表面等离子体激元(SP)增强的光致发光(PL)。当发射光谱相对于SP吸收共振红移时，可以观察到量子点发光强度的增强。与SPS的耦合导致了光致发光谱的红移和展宽，并增加了光致发光的衰减率。在量子点的单分子膜中观察到最大的耦合，其峰值发射在667 nm处，使发光强度增加了10倍。在SP共振时，荧光强度和衰减率没有变化。(C)2006年美国物理研究所。
Surface plasmon (SP) enhanced photoluminescence (PL) from CdTe quantum dots (QDs) on monolayers of Au nanoparticles is investigated under both resonant and nonresonant conditions. Enhancement of the QD PL intensity is observed when the emission spectrum is redshifted with respect to the SP absorption resonance. Coupling to the SPs results in a redshift and broadening of the PL spectrum, and an increase in the PL decay rate. The largest coupling is observed for QD monolayers with peak emission at 667 nm, producing a ten fold increase in PL intensity. No change in PL intensity and decay rate is observed at the SP resonance. (c) 2006 American Institute of Physics.