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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8799–8807

Directional coupling in long-range dielectric-loaded plasmonic waveguides

Vladimir A. Zenin, Zhanghua Han, Valentyn S. Volkov, Kristjan Leosson, Ilya P. Radko, and Sergey I. Bozhevolnyi  »View Author Affiliations


Optics Express, Vol. 21, Issue 7, pp. 8799-8807 (2013)
http://dx.doi.org/10.1364/OE.21.008799


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Abstract

Directional couplers (DCs) based on long-range dielectric-loaded surface plasmon-polariton waveguides (LR-DLSPPWs) operating at telecom wavelengths are studied both numerically and experimentally. The investigated LR-DLSPPWs are formed by ~1.2-µm-high and 1-µm-wide polymer ridges fabricated atop of 15-nm-thick and 500-nm-wide gold stripes supported by a 288-nm-thick Ormoclear polymer deposited on a low-index (ns ≈1.34) layer of Cytop. DC structures consisting of sine-shaped S-bends (having an offset of ~10 µm over a distance of ~20 µm) and ~100-µm-long parallel LR-DLSPPWs with a center-to-center separation of 2 µm are characterized using scanning near-field microscopy. The experimentally obtained values of the propagation length (~400 µm), S-bend loss (~4 dB) and coupling length (~100 µm) are found in good agreement with the numerical simulations, indicating a significant potential of LR-DLSPPWs for the realization of various plasmonic components.

© 2013 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(250.5300) Optoelectronics : Photonic integrated circuits
(250.5403) Optoelectronics : Plasmonics

ToC Category:
Optics at Surfaces

History
Original Manuscript: February 20, 2013
Revised Manuscript: March 19, 2013
Manuscript Accepted: March 20, 2013
Published: April 2, 2013

Citation
Vladimir A. Zenin, Zhanghua Han, Valentyn S. Volkov, Kristjan Leosson, Ilya P. Radko, and Sergey I. Bozhevolnyi, "Directional coupling in long-range dielectric-loaded plasmonic waveguides," Opt. Express 21, 8799-8807 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-7-8799


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