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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 13 — Jun. 22, 2009
  • pp: 10757–10766

Absorption switches in metal-dielectric-metal plasmonic waveguides

Changjun Min and Georgios Veronis  »View Author Affiliations

Optics Express, Vol. 17, Issue 13, pp. 10757-10766 (2009)

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We theoretically investigate the properties of absorption switches for metal-dielectric-metal (MDM) plasmonic waveguides. We show that a MDM waveguide directly coupled to a cavity filled with an active material with tunable absorption coefficient can act as an absorption switch, in which the on/off states correspond to the absence/presence of optical pumping. We also show that a MDM plasmonic waveguide side-coupled to a cavity filled with an active material can operate as an absorption switch, in which the on/off states correspond to the presence/absence of pumping. For a specific modulation depth, the side-coupled-cavity switch results in more compact designs compared to the direct-coupled-cavity switch. Variations in the imaginary part of the refractive index of the material filling the cavity of Δκ = 0.01 (Δκ = 0.15) result in ~60% (~99%) modulation depth. The properties of both switches can be accurately described using transmission line theory.

© 2009 OSA

OCIS Codes
(130.2790) Integrated optics : Guided waves
(240.6680) Optics at surfaces : Surface plasmons
(130.4815) Integrated optics : Optical switching devices

ToC Category:
Integrated Optics

Original Manuscript: May 13, 2009
Revised Manuscript: June 7, 2009
Manuscript Accepted: June 8, 2009
Published: June 11, 2009

Changjun Min and Georgios Veronis, "Absorption switches in metal-dielectric-metal plasmonic waveguides," Opt. Express 17, 10757-10766 (2009)

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