Abstract

A simple method to obtain the coupling characteristics of a directional coupler consisting of two dielectric-loaded surface plasmon polariton waveguides is reported. The method is found to give accurate results in comparison with the widely used effective index method. Theoretical results are also found to match excellently with recently reported measurements on coupling lengths in such waveguides [Opt. Lett.34, 310 (2009)OPLEDP0146-959210.1364/OL.34.000310].

© 2009 Optical Society of America

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History
Original Manuscript: March 31, 2009
Manuscript Accepted: July 10, 2009
Revised Manuscript: July 7, 2009
Published: July 27, 2009

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Author Affiliations

Triranjita Srivastava, Arun Kumar

Indian Institute of Technology Delhi

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