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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 1 — Jan. 1, 2010
  • pp: 112–117

Plasmonic Bloch oscillations in metal heterowaveguide superlattices and metal waveguide arrays with graded width of guiding regions

Weihua Lin and Lin Chen  »View Author Affiliations


JOSA B, Vol. 27, Issue 1, pp. 112-117 (2010)
http://dx.doi.org/10.1364/JOSAB.27.000112


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Abstract

We study the propagation of surface plasmon polaritons (SPPs) in nanoscale metal heterowaveguide superlattices and metal waveguide arrays (MWGAs), both realized by gradually increasing the width of guiding regions. Theoretical analysis of the transmission properties of SPPs passing through the metal heterowaveguide superlattices by the transfer matrix method reveals that the SPPs minibands and minigaps in the frequency domain exhibit a spatial tilting, implying the appearance of plasmonic Wannier–Stark ladders and the existence of time-resolved plasmonic Bloch oscillations (BOs) in the superlattices. The analytic results of the coupled wave theory show that SPPs periodically oscillate transversely in the MWGAs under conditions of multiple waveguide excitation as the behavior of spatial BOs. Numerical simulations of the dynamic evolution of SPPs in the superlattices and MWGAs by the finite-difference time-domain method demonstrate the analytical predications well.

© 2009 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: July 29, 2009
Revised Manuscript: October 29, 2009
Manuscript Accepted: November 27, 2009
Published: December 24, 2009

Citation
Weihua Lin and Lin Chen, "Plasmonic Bloch oscillations in metal heterowaveguide superlattices and metal waveguide arrays with graded width of guiding regions," J. Opt. Soc. Am. B 27, 112-117 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-1-112

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