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High sensitivity and large field enhancement of symmetry broken Au nanorings: effect of multipolar plasmon resonance and propagation
S. D. Liu, Z. S. Zhang, and Q. Q. Wang »View Author Affiliations
Department of Physics, Key Laboratory of Acoustic and Photonic Materials and Devices of Ministry of Education, Wuhan University, Wuhan, 430072, People’s Republic of China
*Corresponding author: qqwang@whu.edu.cn
Optics Express, Vol. 17, Issue 4, pp. 2906-2917 (2009)
http://dx.doi.org/10.1364/OE.17.002906
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Abstract
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.
© 2009 Optical Society of America
OCIS Codes
(130.6010) Integrated optics : Sensors
(240.6680) Optics at surfaces : Surface plasmons
(160.4236) Materials : Nanomaterials
ToC Category:
Optics at Surfaces
History
Original Manuscript: January 16, 2009
Revised Manuscript: February 10, 2009
Manuscript Accepted: February 10, 2009
Published: February 11, 2009
Virtual Issues
Vol. 4, Iss. 4 Virtual Journal for Biomedical Optics
Citation
S. D. Liu, Z. S. Zhang, and Q. Q. Wang, "High sensitivity and large field enhancement of symmetry broken Au nanorings: effect of multipolar plasmon resonance and propagation," Opt. Express 17, 2906-2917 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-17-4-2906
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