期刊
ACS NANO
卷 10, 期 4, 页码 3968-3976出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.6b00287
关键词
plasmonics; silver nanowire; surface plasmon coupled emission; fluorescence energy transfer; LDOS; FRET
类别
资金
- European Commission [FP7-ICT-2011-7, ERC StG 278242]
- Agence Nationale de la Recherche [ANR-13-BS10-0007]
- Agence Nationale de la Recherche (ANR) [ANR-13-BS10-0007] Funding Source: Agence Nationale de la Recherche (ANR)
The development of quantum plasmonic circuitry requires efficient coupling between quantum emitters and plasmonic waveguides. A major experimental challenge is to simultaneously maximize the surface plasmon propagation length, the coupling efficiency into the plasmonic mode, and the Purcell factor. Addressing this challenge is also the key to enabling long-range energy transfer between quantum nanoemitters. Here, we use a dual-beam scanning confocal microscope to carefully investigate the interactions between fluorescent nano particles and surface plasmons on single-crystalline silver nanowires. By exciting the fluorescent nanoparticles via nanowire surface plasmons, we maximize the light matter interactions and reach coupling efficiencies up to 44% together with 24x lifetime reduction and 4.1 pm propagation lengths. This improved optical performance enables the demonstration of long-range plasmon-mediated fluorescence energy transfer between two nanoparticles separated by micrometer distance. Our results provide guidelines toward practical realizations of efficient long-range fluorescence energy transfer for integrated plasmonics and quantum nano optics.
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