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Optics Letters

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  • Vol. 36, Iss. 7 — Apr. 1, 2011
  • pp: 1170–1172

Experimental observation of evanescent modes at the interface to slow-light photonic crystal waveguides

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


Optics Letters, Vol. 36, Issue 7, pp. 1170-1172 (2011)
http://dx.doi.org/10.1364/OL.36.001170


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Abstract

We experimentally study the fields close to an interface between two photonic crystal waveguides that have different dispersion properties. After the transition from a waveguide in which the group velocity of light is v g c / 10 to a waveguide in which it is v g c / 100 , we observe a gradual increase in the field intensity and the lateral spreading of the mode. We attribute this evolution to the existence of a weakly evanescent mode that exponentially decays away from the interface. We compare this to the situation where the transition between the waveguides only leads to a minor change in group velocity and show that, in that case, the evolution is absent. Furthermore, we apply novel numerical mode extraction techniques to confirm experimental results.

© 2011 Optical Society of America

OCIS Codes
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(130.5296) Integrated optics : Photonic crystal waveguides

ToC Category:
Integrated Optics

History
Original Manuscript: February 3, 2011
Manuscript Accepted: February 27, 2011
Published: March 25, 2011

Citation
Marko Spasenović, Thomas P. White, Sangwoo Ha, Andrey A. Sukhorukov, Tobias Kampfrath, Yuri S. Kivshar, C. Martijn de Sterke, Thomas F. Krauss, and L. (Kobus) Kuipers, "Experimental observation of evanescent modes at the interface to slow-light photonic crystal waveguides," Opt. Lett. 36, 1170-1172 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-7-1170


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References

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