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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 11 — May. 24, 2010
  • pp: 11089–11096

Low-loss surface-plasmonic nanobeam cavities

Myung-Ki Kim, Seung Hoon Lee, Muhan Choi, Byeong-Hyeon Ahn, Namkyoo Park, Yong-Hee Lee, and Bumki Min  »View Author Affiliations


Optics Express, Vol. 18, Issue 11, pp. 11089-11096 (2010)
http://dx.doi.org/10.1364/OE.18.011089


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Abstract

One-dimensional surface-plasmonic nanobeam cavities are proposed as a means to confine surface plasmons to a subwavelength-scale mode volume, while maintaining a relatively high Q-factor. By bonding one-dimensional photonic-crystal nanobeam structures to a low-loss metallic substrate, a clear plasmonic TM bandgap can be formed. The introduction of a single-cell defect alongside the engineering of side-air-hole shifts to this plasmonic-crystal nanobeam provides subwavelength-scale plasmonic mode localization within the plasmonic TM bandgap. This suppresses radiation and scattering loss to render a maximum Q-factor of 413 and a modal volume of 3.67 × 10−3 μm3 at room temperature. The possibility of further reduction in the intrinsic loss of the cavity is investigated by lowering the operating temperature and the Q-factor of 1.34 × 104 is predicted at a temperature of 20K for the optimistic case.

© 2010 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(140.3945) Lasers and laser optics : Microcavities
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optics at Surfaces

History
Original Manuscript: April 2, 2010
Revised Manuscript: May 5, 2010
Manuscript Accepted: May 5, 2010
Published: May 11, 2010

Citation
Myung-Ki Kim, Seung Hoon Lee, Muhan Choi, Byeong-Hyeon Ahn, Namkyoo Park, Yong-Hee Lee, and Bumki Min, "Low-loss surface-plasmonic nanobeam cavities," Opt. Express 18, 11089-11096 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-11-11089


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