This study investigates plasmonic Bloch oscillations (PBOs) in cylindrical metal–dielectric waveguide arrays (MDWAs) by performing numerical simulations and theoretical analyses. Optical conformal mapping is used to transform cylindrical MDWAs into equivalent chirped structures with permittivity and permeability gradients across the waveguide arrays, which is caused by the curvature of the cylindrical waveguide. The PBOs are attributed to the transformed structure. The period of oscillation increases with the wavelength of the incident Gaussian beam. However, the amplitude of oscillation is almost independent of wavelength.
© 2010 Optical Society of America
Original Manuscript: August 26, 2010
Revised Manuscript: October 17, 2010
Manuscript Accepted: October 24, 2010
Published: November 24, 2010
Ruei-Cheng Shiu, Yung-Chiang Lan, and Chin-Min Chen, "Plasmonic Bloch oscillations in cylindrical metal–dielectric waveguide arrays," Opt. Lett. 35, 4012-4014 (2010)