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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 14997–15005

Resonant-tunnelling-assisted crossing for subwavelength plasmonic slot waveguides

Sanshui Xiao and Niels Asger Mortensen  »View Author Affiliations


Optics Express, Vol. 16, Issue 19, pp. 14997-15005 (2008)
http://dx.doi.org/10.1364/OE.16.014997


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Abstract

We theoretically investigate properties of crossing for two perpendicular subwavelength plasmonic slot waveguides. In terms of symmetry consideration and resonant-tunnelling effect, we design compact cavity-based crossing structures for nanoplasmonic waveguides. Our results show that the crosstalk is practically eliminated and the throughput reaches the unity on resonance. Simulation results are in agreement with those from coupled-mode theory. Taking the material loss into account, the symmetry properties of the modes are preserved and the crosstalk remains suppressed, while the throughput is naturally lowered. Our results may open a way to construct nanoscale crossings for high-density nanoplasmonic integration circuits.

© 2008 Optical Society of America

OCIS Codes
(130.2790) Integrated optics : Guided waves
(130.3120) Integrated optics : Integrated optics devices
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Integrated Optics

History
Original Manuscript: June 25, 2008
Revised Manuscript: September 5, 2008
Manuscript Accepted: September 5, 2008
Published: September 9, 2008

Citation
Sanshui Xiao and Niels A. Mortensen, "Resonant-tunnelling-assisted crossing for subwavelength plasmonic slot waveguides," Opt. Express 16, 14997-15005 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-19-14997


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