Photonic Bloch-dipole-Zener Oscillations in Binary Parabolic Optical Waveguide Arrays

TL;DR

This paper investigates light propagation and tunneling in a binary parabolic optical waveguide array, revealing complex oscillations and tunneling phenomena with potential applications in optical devices.

Contribution

It introduces the concept of Bloch-dipole-Zener oscillations in binary parabolic waveguide arrays, a novel coherent optical phenomenon not previously reported.

Findings

Identification of Bloch-Zener oscillations in BPOWA

Discovery of Bloch-dipole-Zener oscillations

Potential applications in optical splitting and waveguiding

Abstract

We have studied the propagation and Zener tunneling of light in the binary parabolic optical waveguide array (BPOWA), which consists of two evanescently coupled dissimilar optical waveguides. Due to Bragg reflections, 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 the field-evolution analysis. The results may have potential applications in optical splitting and waveguiding devices and shed light on the coherent phenomena in optical lattices.