Journal
OPTICS EXPRESS
Volume 14, Issue 10, Pages 4494-4503Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.14.004494
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We report the design, fabrication and characterization of compact gradual bends for channel plasmon polaritons (CPPs) being excited at telecom wavelengths. We obtain high-quality near-field optical images of CPP modes propagating along a bent V-groove in gold, which indicate good CPP mode confinement in the groove and efficient guiding around the compact S-bend connecting two 5-mu m-offset grooves over a distance of 5 mu m. Using averaged cross sections of the CPP intensity distributions before and after the S-bend, the total bend loss is evaluated and found to be close to 2.3 dB for the wavelengths in the range of 1430-1640 nm. (c) 2006 Optical Society of America.
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