We study the reflection of Bloch wave packets at the interface of an optical lattice possessing a shallow longitudinal out-of-phase refractive index modulation in the adjacent waveguides. We show that the relation between the transmitted and reflected energy flows can be efficiently controlled by tuning the frequency and depth of the modulation. Thus, complete beam reflection may be achieved for a set of resonant modulation frequencies at which light tunneling between adjacent guides of modulated lattice is inhibited.
© 2010 Optical Society of America
Optics at Surfaces
Original Manuscript: September 14, 2010
Revised Manuscript: October 22, 2010
Manuscript Accepted: November 12, 2010
Published: December 15, 2010
Yaroslav V. Kartashov, Victor A. Vysloukh, and Lluis Torner, "Bloch-wave packet control in truncated modulated optical lattices," Opt. Lett. 35, 4220-4222 (2010)