We consider a waveguide array in which defect channels with reduced refractive index are spaced periodically and the light guiding is achieved because of Bragg reflection. We show that tunneling between defects can be inhibited using out-of-phase longitudinal modulation of refractive index exclusively in defect channels. Tunneling inhibition is almost perfect for strongly localized modes with propagation constants close to the gap center.
© 2010 Optical Society of America
Original Manuscript: March 23, 2010
Revised Manuscript: May 6, 2010
Manuscript Accepted: May 14, 2010
Published: June 14, 2010
Yaroslav V. Kartashov and Victor A. Vysloukh, "Light tunneling inhibition in longitudinally modulated Bragg-guiding arrays," Opt. Lett. 35, 2097-2099 (2010)