菌紫质光生物分子器件及其超快过程

Bacteriorhodopsin Photo-biomolecular Deviceand Its Ultrafast Process

菌紫质是嗜盐菌紫膜中的一种光能转换蛋白。它具有光致色变和光驱动质子泵功能，其原初光异构化过程极其迅速，可在４３０ｆｓ内完成。由于菌紫质具有一系列独特的光电和光学特性，如对光强的微分响应，高的空间分辨率，高的光灵敏度，高循环次数等，使得它在光电探测，仿视觉系统，人工神经网络，非线性光学及光学信息记录和处理方面有很多重要应用。利用超短脉冲激光技术，高时间分辨光谱学技术及高速取样探测技术，对菌紫质的光循环，原初光异构化，激发态动力学，质子泵机制等方面的研究已取得了许多有意义的结果。

Bacteriorhodopsin is a kind of pho-to-energy conversion protein existing in thepurple membrane of halobacterium halobium.It serves the function of photochromic materi-als and light-driven proton pumps,with anextremely fast primary photo-isomeric processoccurring within 430ps. On account of the factthat bacteriorhodopsin has a series of uniquephotoelectrical and optical properties such asdifferential responsivity to light intensity,high spatial resolution,high photosensitivity,high cycling,etc.,it has found many impor-tant applications in photoelectrical detection,visual simulation system,artificial neural net-work, nonlinear optics and optical informationrecording and processing. Depended on thetechniques of ultrafast pulse laser,highlytime-resolved spectroscopy and high speedsampling detection,studies on bacteri-orhodopsin′s photocycle,primary photo-iso-merization,excited state dynamics,light-driven proton pump mechanism and other as-pects have been successfully developed withmany significant results.