ELECTRIC FIELD EFFECTS ON PHOTOSYSTEM II ELECTRON TRANSFER

本研究为飞秒激光器的研制提供了实验平台 在RLBL的光谱方法。 我们正在开发测量 在特别设计的电容器中的电子转移动力学， 膜结合反应中心蛋白。 这就要求设计 飞秒脉冲和激光之间的关键耦合协议 在整个结构中创建字段。 其基本思想是控制 利用外加电场改变自由能的电子转移 变化 从光谱学的观点来看，最大的挑战是 提高fs实验中的信噪比， 移动或流动。 此外，将这些实验与 脉冲电场和有关的演示的存在 是不平凡的。 目前的工作显示， 电子转移过程的前景和已经出现的新特征， 被观察到。

This research is a test bed for the development of femtosecond spectroscopic methods at RLBL. We are developing ways of measuring electron transfer dynamics in specially designed capacitors made from membrane bound reaction center protein. This has demanded the design of critical coupling protocols between femtosecond pulses and the creation of fields across the structure. The basic idea is to control the electron transfer by using applied fields to alter the free energy changes. From the spectroscopic standpoint the great challenge is to improve the signal-to noise in fs experiments where the sample cannot be moved or flowed. Furthermore, the coupling of such experiments to pulsed electric fields and concerning demonstrations of the presence of transient fields is nontrivial. The current work shows great promise and already new features of the electron transfer process have been observed.