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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 15 — Aug. 1, 2014
  • pp: 4356–4359

Silicon-based metal-loaded plasmonic waveguides for low-loss nanofocusing

Lucas Lafone, Themistoklis P. H Sidiropoulos, and Rupert F. Oulton  »View Author Affiliations

Optics Letters, Vol. 39, Issue 15, pp. 4356-4359 (2014)

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We introduce plasmonic waveguides based on metal loading of silicon-on-insulator (SOI) substrates. Here slab waveguide modes hybridize with the plasmonic modes of either a metal nanowire or a slot in a metal film. By tapering a single dimension of either structure, the resulting hybrid mode can be converted from photon-like to plasmon-like, allowing up to millimeter-range transport and rapid nanoscale focusing down to mode areas λ2/400. Metal loading is achievable with a single lithography step directly on SOI without the need for etching and, thus, opens practical possibilities for silicon nanoplasmonics.

© 2014 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.5990) Integrated optics : Semiconductors
(240.6680) Optics at surfaces : Surface plasmons
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Integrated Optics

Original Manuscript: April 29, 2014
Revised Manuscript: May 28, 2014
Manuscript Accepted: June 14, 2014
Published: July 21, 2014

Lucas Lafone, Themistoklis P. H Sidiropoulos, and Rupert F. Oulton, "Silicon-based metal-loaded plasmonic waveguides for low-loss nanofocusing," Opt. Lett. 39, 4356-4359 (2014)

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