一种新型的非线性光学材料──紫膜LB膜

A New Nonlinear Optical Material──Purple Membrane Langmuir-Blodgett Film

本文研究光敏生物大分子掺杂的ＬＢ膜──紫膜ＬＢ膜的制备及其３次和高次光学非线性特性，研究紫膜ＬＢ膜中以光学非线性效应为基础的双光束耦合、多波混频和相位共轭等物理现象。研究结果表明，紫膜ＬＢ膜有可能在光学信息处理和光计算中得到应用。

The preparation and nonlinear char-acteristics of a new kind of Langmuir-Blodgett(LB)films doped with biomolecular materials──purplemembrane(PM)LB films have been studied .Thepure purple membrane LB films have been preparedsuccessfully by horizontal transfer method. Thethird-order susceptibility X￣[3] of this LB film is ashigh as l0￣-3 esu, which is four order in magnitudegreater than that of PDA LB film,The experimen-tal study of two beams coupling, multi-wave mixingand phase conjugation is performed. The results ob-tained are valuabe for the development of new kindof nonlinear optical materials and applications of LBfilms in optical signal processing and optical convputing.