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Gap surface plasmon polaritons enhanced by a plasmonic lens |
Optics Letters, Vol. 36, Issue 16, pp. 3082-3084 (2011)
http://dx.doi.org/10.1364/OL.36.003082
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Abstract
We numerically investigate the optical field enhancement based on gap surface plasmon polaritons (GSPPs) that are enhanced by propagating surface waves launched by a circular slit at a metal–dielectric interface. The optical field enhancement originates not only from multiple scattering and coupling of GSPPs in the spacer region between two metal layers but also from propagating surface plasmon polaritons (SPPs) launched by a circular plasmonic lens. We find that the combination of the GSPPs and the propagating SPPs launched by the plasmonic lens can achieve extremely strong field confinement, and we find that the surface-enhanced Raman scattering (SERS) enhancement factor can be up to
© 2011 Optical Society of America
OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering
ToC Category:
Optics at Surfaces
History
Original Manuscript: May 31, 2011
Revised Manuscript: July 9, 2011
Manuscript Accepted: July 13, 2011
Published: August 8, 2011
Virtual Issues
Vol. 6, Iss. 9 Virtual Journal for Biomedical Optics
Citation
Hyun Chul Kim and Xing Cheng, "Gap surface plasmon polaritons enhanced by a plasmonic lens," Opt. Lett. 36, 3082-3084 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-16-3082
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