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Surface plasmon polaritons in thin metal films and their role in fiber optic polarizing devices

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4 Author(s)
Johnstone, W. ; Dept. of Electr. & Electron. Eng., Strathclyde Univ., Glasgow, UK ; Stewart, G. ; Hart, T. ; Culshaw, B.

The polarization-selective evanescent field coupling of an optical wave in a 1.3-μm, fiber to surface, plasmon polaritons supported by a thin aluminium film was investigated theoretically and experimentally. Good agreement was observed between the theoretically predicted conditions for efficient coupling and the experimentally determined conditions for high TM/TE extinction ratio of the optical field. The use of silver and chrome in place of aluminum was investigated experimentally at 1.3 μm, and 0.63-μm devices using aluminium were also studied. The results led to the realization of readily manufacturable, high-extinction-ratio (>50 dB) low-loss (<0.5 dB) fiber optic polarizers and polarizing couplers in standard and highly birefringent fiber

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Lightwave Technology, Journal of  (Volume:8 ,  Issue: 4 )