Self‐focusing of ruby laser light is studied as a function of sample length and temperature in the isotropic phase of nematic liquid‐crystal MBBA. The critical power for self‐focusing, 0.36 kW, observed near the phase transition temperature is a factor of 20 times less than that for CS2. The corresponding nonlinear index 4.4 × 10−10 esu is the largest value known so far for any material.
Rao, D.V.G.L.N. and Jayaraman, S., "Self‐focusing of laser light in the isotropic phase of a nematic liquid crystal" (1973). Physics Faculty Publications. 36.
American Institute of Physics
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