Abstract
We report some quantitative studies of four-wave mixing in aligned nematic-liquid-crystal films. Using an unfocused cw laser of 200 mW power, at an estimated intensity of 5 W/, we have observed a conversion efficiency of . The third-order nonlinear polarization that is responsible for this wave-mixing process is attributed to the optically induced molecular reorientation. A quantitative calculation of the wave-mixing efficiency and the intensity dependence is presented. It is shown that the experimental results are in good agreement with the theoretical predictions.
- Received 22 October 1980
DOI:https://doi.org/10.1103/PhysRevA.23.2077
©1981 American Physical Society