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ULTRA SLOW EM WAVE PROPAGATION CHARACTERISTICS OF LEFT-HANDED MATERIAL LOADED HELICAL GUIDE

By D. K. Sharma and S. K. Pathak

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Abstract:
The dispersion characteristics (ω-β diagram) of a left-handed material (LHM) loaded helical guide is analytically solved and numerically computed for different metamaterial medium properties as well as helical guide parameters. The modal behaviour of this structure has been studied with an aim to achieve ultra slow wave over wide bandwidth which finds potential applications in optical switches and memories for optical processing. Significant amount of phase velocity reduction has been achieved in comparison to when helix is in free space or loaded with normal dielectric column. Other modal properties such as presence of two fundamental modes - backward and forward wave and their lower cut-off frequency (LCF) as well as bandwidth spectrum are also revealed thoroughly.

Citation:
D. K. Sharma and S. K. Pathak, "Ultra Slow EM Wave Propagation Characteristics of Left-Handed Material Loaded Helical Guide," Progress In Electromagnetics Research M, Vol. 35, 11-19, 2014.
doi:10.2528/PIERM14010102

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