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Optics Letters

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  • Vol. 36, Iss. 11 — Jun. 1, 2011
  • pp: 2011–2013

Ultrasmall subwavelength nanorod plasmonic cavity

Ju-Hyung Kang, You-Shin No, Soon-Hong Kwon, and Hong-Gyu Park  »View Author Affiliations


Optics Letters, Vol. 36, Issue 11, pp. 2011-2013 (2011)
http://dx.doi.org/10.1364/OL.36.002011


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Abstract

We propose an ultrasmall plasmonic cavity consisting of a high-index/low-index dielectric nanorod covered with silver. Full three-dimensional subwavelength confinement of the surface-plasmon polaritons was achieved at the high-index dielectric–silver interface without propagating to the low-index dielectric–silver interface. The numerical simulations showed that the plasmonic mode excited in this cavity has a deep subwavelength mode volume of 0.0038 ( λ / 2 n ) 3 and a quality factor of 1500 at 40 K , and consequently a large Purcell factor of 2 × 10 5 . Therefore, this plasmonic cavity is expected to be useful for the demonstration of high-efficiency single photon sources or low-threshold lasers in an ultracompact nanophotonic circuit.

© 2011 Optical Society of America

OCIS Codes
(220.4241) Optical design and fabrication : Nanostructure fabrication
(250.5403) Optoelectronics : Plasmonics
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: March 8, 2011
Revised Manuscript: April 22, 2011
Manuscript Accepted: April 22, 2011
Published: May 26, 2011

Citation
Ju-Hyung Kang, You-Shin No, Soon-Hong Kwon, and Hong-Gyu Park, "Ultrasmall subwavelength nanorod plasmonic cavity," Opt. Lett. 36, 2011-2013 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-11-2011


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