【摘要】 对细菌视紫红质（ＢＲ）膜的光学吸收非线性进行了研究， 分别测量了细菌视紫红质光照前后的光吸收谱， 结果显示它的吸收发生了明显的变化。用Ｚ扫描法研究了它的光学非线性， 理论计算的结果表明它具有较大的光学非线性系数， 且通过测量它的透过率随光强变化的关系曲线和理论模拟发现它对６３２．８ ｎｍ 波长的光具有饱和吸收特性更多还原

【Abstract】 The optical nonlinearity in bacteriorhodopsin (BR) is studied. The absorption spectra of BR before and after illuminating BR are measured respectively and the result shows a great change of absorption to light. Its optical nonlinearity by Z scan is studied, the result of the theoretical calculation shows that it has bigger optical nonlinearity coefficient than other materials. A saturable absorption at wavelength 632.8 nm is found by measuring and theoretically simulating the change of its transmissitivity with input intensity.更多还原