|Copyright The American Physical Society 2001. |
The archivial version of this work is published in Phys. Rev. A. 64, 063813 (2001).
PDF version (see below for some errors to fix.)
Degenerate four-wave mixing in noncentrosymmetric materials
This work treats degenerate four-wave mixing (DFWM) in noncentrosymmetric materials, taking into full account the fact that the DFWM signal arises from third-order nonlinear optical effects as well as from two distinct combinations of second-order effects: second-harmonic generation plus difference frequency generation and optical rectification plus Pockels effect. Because of these second order "cascaded" contributions, the DFWM signal becomes dependent on details of the experimental setup that do not normally matter for centrosymmetric materials, such as the wave vectors of the interacting beams and the pulse duration. The origin, consequences, and possible applications of these effects are discussed for both the "forward" and the "phase-conjugation" DFWM configurations. All second-order contributions are described quantitatively by introducing effective third-order susceptibilities, and their value is discussed using the example of two materials: ferroelectric KNbO3 and the organic salt 4-N,N-dimethylamino-4'-N'-methyl-stilbazolium tosylate.
PACS: 42.65.An, 42.65.Hw, 78.20.Jq, 42.65.Ky
After this work appeared in press I became aware of some typing errors that unfortunately ended up in the final article. These errors do not affect the theory or any of the equations presented in the article, but they do affect the ability of curious readers to reproduce some of the numerical results.
Please fix the following errors: