Nonlinear adiabatic evolution and emission of coherent Bloch waves in optical lattices

Andrea Fratalocchi*, Gaetano Assanto

*Corresponding author for this work

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12 Scopus citations


We investigate energy propagation in a perturbed optical lattice, studying the nonlinear adiabatic evolution of a light beam. Through an asymptotic model, we demonstrate that: (i) energy propagating in the adiabatic regime visualizes the dispersion relation of the unperturbed lattice; (ii) the adiabatic evolution can be broken by nonlinearity, giving rise to tunneling between Bloch bands; (iii) the tunneling is accompanied by nonlinear emission of one-or more-coherent Bloch waves, the properties of which can be completely controlled by linear and/or nonlinear parameters. We verify the analytical results against numerical simulations and indicate possible experimental implementations.

Original languageEnglish (US)
Article number013626
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number1
StatePublished - Jan 30 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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