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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 4 — Feb. 14, 2011
  • pp: 2972–2978

Power monitoring in dielectric-loaded surface plasmon-polariton waveguides

Ashwani Kumar, Jacek Gosciniak, Thomas B. Andersen, Laurent Markey, Alain Dereux, and Sergey I. Bozhevolnyi  »View Author Affiliations


Optics Express, Vol. 19, Issue 4, pp. 2972-2978 (2011)
http://dx.doi.org/10.1364/OE.19.002972


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Abstract

We report on propagating mode power monitoring in dielectric-loaded surface plasmon-polariton waveguides (DLSPPWs) by measuring the resistance of gold stripes supporting the DLSPPW mode propagation. Inevitable absorption of the DLSPPW mode in metal causes an increase in the stripe temperature and, thereby, in its resistance whose variations are monitored with an external Wheatstone bridge being accurately balanced in the absence of radiation in a waveguide. The investigated waveguide configuration consists of a 1-µm-thick and 10-µm-wide polymer ridges tapered laterally to a 1-µm-wide ridge placed on a 50-nm-thin and 4-µm-wide gold stripe, all supported by a magnesium fluoride substrate. Using single-mode polarization-maintaining fiber for in- and out-coupling of radiation, DLSPPW mode power monitoring at telecom wavelengths is realized with the responsivities of up to ~1.8 µV/µW (showing weak wavelength dependence) being evaluated for a bias voltage of 1 V.

© 2011 OSA

OCIS Codes
(230.7380) Optical devices : Waveguides, channeled
(240.6680) Optics at surfaces : Surface plasmons
(250.5300) Optoelectronics : Photonic integrated circuits

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 6, 2010
Revised Manuscript: January 20, 2011
Manuscript Accepted: January 27, 2011
Published: February 1, 2011

Citation
Ashwani Kumar, Jacek Gosciniak, Thomas B. Andersen, Laurent Markey, Alain Dereux, and Sergey I. Bozhevolnyi, "Power monitoring in dielectric-loaded surface plasmon-polariton waveguides," Opt. Express 19, 2972-2978 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-4-2972


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