Optical Zener-Bloch oscillations in binary waveguide arraysS. Longhi
Dipartimento di Fisica and Istituto di Fotonica e Nanotecnologie del CNR Politecnico di Milano - Piazza L. da Vinci 32, I-20133 Milano, Italy
received 22 June 2006; accepted in final form 18 September 2006
published online 11 October 2006
Zener tunneling in a binary array of coupled optical waveguides with transverse index gradient is shown to produce a sequence of regular or irregular beam splitting and beam recombination events superimposed to Bloch oscillations. These periodic or aperiodic Zener-Bloch oscillations provide a clear and visualizable signature in an optical system of coherent multiband dynamics encountered in solid-state or matter-wave systems.
42.82.Et - Waveguides, couplers, and arrays.
42.65.Sf - Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics.
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