Kinetic description of the field–gas interaction in intense optical lattices

Abstract In this paper the effects of coupling a non-resonant optical lattice to a gas are studied. When the lattice induces a periodic modulation of the gas density, strong Bragg diffraction of light can occur limiting the achievable intensities inside the lattice reducing the ability to manipulate the gas with the lattice. We calculate the evolution of the light fields by finding solutions to the wave equation with a periodic refractive index induced by the lattice. The local gas density perturbation induced by the lattice is determined by solving the Boltzmann kinetic equation in the collisional regime.

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