MEASUREMENT AND ANALYSIS OF OPTICAL NONLINEARITIES OF NEMATIC LIQUID CRYSTALS

摘要

We present the study of optical nonlinearities of nematic liquid crystals under the influence of an external (AC) electrical field. The Z-scan technique is employed as the experimental method to observe and monitor the nonlinear effect. The splitstep method is used to model the beam propagation in the liquid crystal sample, and hence derive the far-field intensity distribution, from which the theoretical Z-scan curves are calculated.