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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 31, Iss. 5 — May. 1, 2014
  • pp: 1096–1102

Graphene ribbons for tunable coupling with plasmonic subwavelength cavities

Gilles Rosolen and Bjorn Maes  »View Author Affiliations


JOSA B, Vol. 31, Issue 5, pp. 1096-1102 (2014)
http://dx.doi.org/10.1364/JOSAB.31.001096


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Abstract

Since graphene supports low loss plasmonic guided modes in the infrared range, we theoretically investigate the coupling of these modes in patterned sheets with nanocavities. We calculate cavity modes and (potentially critical) coupling in filter-type circuits, with resonances observed as multiple minima in the reflection spectrum. The origin and properties of the cavity modes are fully modeled by coupled mode theory, exploring for various positions of the cavity with respect to the access waveguide. A useful resonance frequency shift is examined by modifying the graphene doping (e.g., via voltage tuning). The deep subwavelength cavity modes reach quality factors up to 42 for ribbons of 30 nm width around 5 μm wavelength. These resonances provide opportunities for ultracompact optoelectronic circuits.

© 2014 Optical Society of America

OCIS Codes
(230.5750) Optical devices : Resonators
(230.7370) Optical devices : Waveguides
(250.3140) Optoelectronics : Integrated optoelectronic circuits
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optoelectronics

History
Original Manuscript: February 7, 2014
Revised Manuscript: March 14, 2014
Manuscript Accepted: March 18, 2014
Published: April 16, 2014

Citation
Gilles Rosolen and Bjorn Maes, "Graphene ribbons for tunable coupling with plasmonic subwavelength cavities," J. Opt. Soc. Am. B 31, 1096-1102 (2014)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-31-5-1096


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