Journal
OPTICS EXPRESS
Volume 22, Issue 20, Pages 24096-24103Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.024096
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Funding
- Major State Basic Research Development Program of China [2010CB328206]
- National Natural Science Foundation of China (NSFC) [61178008, 61275092]
- Fundamental Research Funds for the Central Universities, China
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We propose in this paper a graphene-coated tapered nanowire probe providing strong field enhancement in the infrared regimes. The analytical field distributions and characteristic equation of the supported surface plasmons mode are derived. Based on the adiabatic approximation, analytic methods are adopted in the investigation of field enhancement along the tapered region and show well consistence with the rigorous numerical simulations. Both the numerical and analytical results have shown that the graphene-coated nanowire probe could achieve an order of magnitude larger field enhancement than the metal-coated probes. The proposed probe may have promising applications for single molecule detection, measurement and nano-manipulation techniques. (C) 2014 Optical Society of America
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