Journal
PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER
Volume 153, Issue -, Pages 123-131Publisher
EMW PUBLISHING
DOI: 10.2528/PIER15092402
Keywords
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Funding
- National Natural Science Foundation of China [91233208, 61178062]
- National High Technology Research and Development Program (863 Program) of China [2012AA030402]
- Program of Zhejiang Leading Team of Science and Technology Innovation
- Postdoctoral Science Foundation of China [2013M541774]
- Preferred Postdoctoral Research Project - Zhejiang Province [BSH1301016]
- Swedish VR grant [621-2011-4620]
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We propose a novel design of broadband plasmonic nanoantenna that is suitable for fluorescence and Raman enhancement. The structure consists of a gold nanoring and bowties at the center. We numerically investigate the near field and far field performance by employing the finite-difference time-domain method. High Purcell enhancement and large SERS are demonstrated in a record wide spectral bandwidth of 700 nm based on a single emitter-antenna configuration. Moreover, unlike a traditional antenna design, the proposed nanoantenna has low heat generation and high field enhancement at the gap simultaneously when operating off resonance.
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