期刊
OPTICS EXPRESS
卷 23, 期 26, 页码 32986-32992出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.032986
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资金
- Max Planck Society
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT & Future Planning [2013R1A1A1011514]
- National Natural Science Foundation of China (NSFC) [11474114]
- National Research Foundation of Korea [2013R1A1A1011514] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Enhancing the spontaneous emission of single emitters has been an important subject in nano optics in the past decades. For this purpose, plasmonic nanoantennas have been proposed with enhancement factors typically larger than those achievable with optical cavities. However, the intrinsic ohmic losses of plasmonic structures also introduce an additional nonradiative decay channel, reducing the quantum yield. Here we report on experimental studies of a weakly coupled dielectric substrate and a plasmonic nanoantenna for enhancing the radiative decay rate of single terrylene molecules embedded in an ultrathin organic film. We systematically investigate how the refractive index of the dielectric substrate affects the lifetime and the quantum efficiency and show that the coupled structure could moderately enhance the radiative decay rate while maintaining a high quantum efficiency. (C)2015 Optical Society of America
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