Journal
OPTICS EXPRESS
Volume 13, Issue 11, Pages 4237-4243Publisher
OPTICAL SOC AMER
DOI: 10.1364/OPEX.13.004237
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We design, fabricate and investigate compact Z-add-drop (ZAD) filters for long-range surface plasmon polaritons (LR-SPPs) at telecom wavelengths. The ZAD filter for LR-SPPs consists of two ridge gratings formed by periodic gold thickness modulation at the intersections of three zigzag-crossed gold stripes embedded in polymer. We investigate influence of the grating length and crossing angle on the filter characteristics and demonstrate a 10 degrees-ZAD filter based on 80-mu m-long gratings that exhibit a 15-dB dip (centered at similar to 1.55 mu m) in transmission of the direct arm along with the corresponding similar to 13-nm-wide transmission peak in the drop arm. (C) 2005 Optical Society of America.
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