We propose the inclusion of a structured pattern of nanoscale metal wires in a silica fiber to form a symmetric plasmonic waveguide. The surface plasmon polariton modes within the waveguide are studied by varying the wire diameter and spacing. Simulation results show that hybridization of the single-wire mode and the gap plasmon mode can yield a hybrid mode with optimum propagation lengths comparable to those reported for other structures but with better light confinement. The fiber can be easily doped with a gain material to offset the loss so that the resultant waveguide will be useful for integration with electronic circuits at nanometer dimensions.
© 2010 Optical Society of America
Original Manuscript: September 2, 2010
Revised Manuscript: October 12, 2010
Manuscript Accepted: October 16, 2010
Published: November 18, 2010
Zhong-Xiang Zhang, Ming-Lie Hu, Kam Tai Chan, and Ching-Yue Wang, "Plasmonic waveguiding in a hexagonally ordered metal wire array," Opt. Lett. 35, 3901-3903 (2010)