We have studied the propagation and Zener tunneling of light in a binary parabolic optical waveguide array (BPOWA), which consists of two evanescently coupled dissimilar optical waveguides. Because of Bragg reflections, the BPOWA attains two minibands separated by a minigap at the zone boundary. Various coherent superpositions of optical oscillations and Zener tunneling occur for different parameters on the phase diagram. In particular, Bloch–Zener oscillation and a different type of Bloch–dipole–Zener oscillation are obtained by field-evolution analysis. The results may have potential applications in optical splitting and waveguiding devices and may shed light on the coherent phenomena in optical lattices.
© 2011 Optical Society of America
Original Manuscript: January 4, 2011
Manuscript Accepted: February 18, 2011
Published: April 29, 2011
Ming Jie Zheng, Yun San Chan, and Kin Wah Yu, "Photonic Bloch–dipole–Zener oscillations in binary parabolic optical waveguide arrays," J. Opt. Soc. Am. B 28, 1339-1343 (2011)