Journal
OPTICS EXPRESS
Volume 17, Issue 4, Pages 2906-2917Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.002906
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Funding
- Natural Science Foundation of China [10534030, 10874134]
- National Program on Key Science Research [2007CB935300]
- Key Project of Ministry of Education [708063]
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The multipolar plasmon resonance and propagation of Au nanorings with symmetry broken were analyzed by using DDA and FDTD methods. Based on the multipolar plasmon resonance and propagation, we proposed ring-nanosensors with high sensitivities and optical ring-nanoantennas with large local field enhancements. We revealed that the refractive index sensitivities of split nanorings are about 100% larger than those of perfect nanorings with same size; the local field intensity enhancement of split nanoring with three gaps has increased by 37% than that of dipole antennas. (c) 2009 Optical Society of America
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