Efficient parametric amplification of narrow beams in photonic crystals

摘要

We theoretically predict and numerically demonstrate that narrow beams (of the width of few wavelengths)can be efficiently parametrically amplified in nonlinear photonic crystal (with X~((2)) nonlinearity) tuned to subdiffractive (self-collimating) regimes. We derive relations and give analytic estimations for the efficiency of amplification.