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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. 28, Iss. 4 — Apr. 1, 2011
  • pp: 955–963

Slow-light and evanescent modes at interfaces in photonic crystal waveguides: optimal extraction from experimental near-field measurements

Sangwoo Ha, Marko Spasenović, Andrey A. Sukhorukov, Thomas P. White, C. Martijn de Sterke, L. (Kobus) Kuipers, Thomas F. Krauss, and Yuri S. Kivshar  »View Author Affiliations


JOSA B, Vol. 28, Issue 4, pp. 955-963 (2011)
http://dx.doi.org/10.1364/JOSAB.28.000955


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Abstract

We develop a systematic approach for simultaneous extraction of the dispersion relations and profiles of multiple modes in periodic waveguides though a special global optimization procedure applied to near-field electric field measurements in the waveguide plane. We apply this method to perform in-depth analysis of experimental data on wave propagation close to an interface between waveguide sections with different dispersion characteristics, and we successfully identify several modes contributing to the experimentally measured fields. We find clear evidence that when the group velocity is reduced across the interface, evanescent modes that facilitate the excitation of propagating slow-light waves appear, confirming previous theoretical predictions.

© 2011 Optical Society of America

OCIS Codes
(230.7370) Optical devices : Waveguides
(250.5300) Optoelectronics : Photonic integrated circuits
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:
Diffraction and Gratings

History
Original Manuscript: December 20, 2010
Manuscript Accepted: February 8, 2011
Published: March 31, 2011

Virtual Issues
April 21, 2011 Spotlight on Optics

Citation
Sangwoo Ha, Marko Spasenović, Andrey A. Sukhorukov, Thomas P. White, C. Martijn de Sterke, L. (Kobus) Kuipers, Thomas F. Krauss, and Yuri S. Kivshar, "Slow-light and evanescent modes at interfaces in photonic crystal waveguides: optimal extraction from experimental near-field measurements," J. Opt. Soc. Am. B 28, 955-963 (2011)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-28-4-955


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References

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