细菌视紫红质膜的光吸收非线性特性研究  

Optical Absorption Nonlinearity in Bacteriorhodopsin

作　　者：黄玉华[1] 龚勤敢[1] 赵有源[1] 陈凌冰[1] 李富铭[1] 刘坚[2] 丁建东[2] 李庆国[3] 

机构地区：[1]复旦大学物理系 [2]复旦大学高分子科学系,上海200433 [3]复旦大学生物与生物物理学系,上海200433

出　　处：《光学学报》1999年第11期1469-1474,共6页Acta Optica Sinica

基　　金：国家自然科学基金

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 ｎｍThe 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.

关 键 词：细菌视紫红质 非线性吸收 饱和吸收 非线性 BR膜 

分 类 号：O437[机械工程—光学工程] Q63[理学—光学]