Direct observation of guided-mode interference in polymer-loaded plasmonic waveguide

We report a direct observation of guided-mode interference in polymer-loaded plasmonic waveguides by the technique of leakage radiation microscopy (LRM). Spatial beating patterns of the interferences were clearly characterized with respect to different structural parameters, and the interference pro...

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Bibliographic Details
Published in:Applied physics letters 2012-10, Vol.101 (17)
Main Authors: Cheng, Q. Q., Li, T., Guo, R. Y., Li, L., Wang, S. M., Zhu, S. N.
Format: Article
Language:English
Subjects:
Dielectrics
Guidelines
Hybrid systems
Interference
Leakage
Microscopy
Plasmonics
Waveguides
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Summary:We report a direct observation of guided-mode interference in polymer-loaded plasmonic waveguides by the technique of leakage radiation microscopy (LRM). Spatial beating patterns of the interferences were clearly characterized with respect to different structural parameters, and the interference properties were analyzed in detail. Besides, the capability of LRM for characterizing the multiple modes was also discussed extensively. Our finding not only offers an efficient technique in analyzing the guided modes and their interference, but also provides a definite guideline in evaluating the validity of LRM and deepens further studies on the dielectric-loaded hybrid waveguide system.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4764116