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

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WhiteJOSAB28SlowLightAndEvanescent2011.pdf (1.139Mb)
Date
04/2011
Author
Ha, Sangwoo
Spasenovic, Marko
Sukhorukov, Andrey A.
White, Tom P
de Sterke, C. Martijn
Kuipers, L. Kobus
Krauss, Thomas Fraser
Kivshar, Yuri S.
Keywords
QC Physics
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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. (C) 2011 Optical Society of America
Citation
Ha , S , Spasenovic , M , Sukhorukov , A A , White , T P , de Sterke , C M , Kuipers , L K , Krauss , T F & Kivshar , Y S 2011 , ' Slow-light and evanescent modes at interfaces in photonic crystal waveguides: optimal extraction from experimental near-field measurements ' , Journal of the Optical Society of America B : Optical Physics , vol. 28 , no. 4 , pp. 955-963 . https://doi.org/10.1364/JOSAB.28.000955
Publication
Journal of the Optical Society of America B : Optical Physics
Status
Peer reviewed
DOI
https://doi.org/10.1364/JOSAB.28.000955
ISSN
0740-3224
Type
Journal article
Rights
© 2011 Optical Society of America. This paper was published in JOSA B: Optical Physics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/JOSAB.28.000955.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/2850

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