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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. 29, Iss. 7 — Jul. 1, 2012
  • pp: 1722–1730

Broadband zero reflection plasmonic junctions

Maryam Farahani, Nosrat Granpayeh, and Mohammad Rezvani  »View Author Affiliations


JOSA B, Vol. 29, Issue 7, pp. 1722-1730 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001722


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Abstract

Introducing an intermediate section between two metal–insulator–metal plasmonic waveguides with unequal width considerably enhances the transmission spectra of a direct junction. In this paper, we design various junctions based on analytic optimization to obtain maximum power transfer through a junction. Using advantages of quasi-static approximation for subwavelength devices, a pure analytic expression is derived, which leads to broader bandwidth and higher transmittance at given frequency. We achieve zero reflection from 125 to 25 nm width MIM junctions by inserting transition sections consisting of quarter-wavelength and tapered structures between two waveguides. Our analysis and optimization results are numerically validated by the finite-difference time-domain simulation.

© 2012 Optical Society of America

OCIS Codes
(230.4170) Optical devices : Multilayers
(230.7370) Optical devices : Waveguides
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(310.6628) Thin films : Subwavelength structures, nanostructures

ToC Category:
Optical Devices

History
Original Manuscript: February 22, 2012
Revised Manuscript: May 8, 2012
Manuscript Accepted: May 9, 2012
Published: June 22, 2012

Citation
Maryam Farahani, Nosrat Granpayeh, and Mohammad Rezvani, "Broadband zero reflection plasmonic junctions," J. Opt. Soc. Am. B 29, 1722-1730 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-7-1722

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