Fenna-Matthews-Olson捕光复合物中的冗余结构（英文）  

Redundancy of Fenna-Matthews-Olson for Energy Harvesting

作　　者：冷轩 梁先庭[1] 

机构地区：[1]宁波大学理学院光学研究所,浙江宁波315211

出　　处：《光子学报》2015年第1期108-116,共9页Acta Photonica Sinica

基　　金：National Natural Science Foundation of China(No.61078065);Zhejiang Provincial Natural Science Foundation of China(No.LY13A040006);K.C.Wong Magna Foundation in Ningbo University

摘　　要：研究了绿色硫细菌中捕光天线复合物Fenna-Matthews-Olson的一个子单元和反应中心的能量传递.通过细菌叶绿素分子的能量和耦合强度,构建了包含反应中心的哈密顿量及约化模型.通过级联运动方程研究了不同分子间和反应中心的激子布居演化.计算了Fenna-Matthews-Olson及其约化模型的二维三阶光子回波谱,获得能量传输过程中不同激子态间的相干性.结果表明在能量捕获过程中,Fenna-Matthews-Olson复合物存在冗余结构.The energy transfer between a subunit of Fenna-Matthews-Olson antenna complex of green sulfur bacteria and its reaction center（sink）was investigated.Through fixing the site energies of bacteriochlorophyll molecules and the coupling strength between the Bacteriochlorophylls（BChls）,a Hamiltonian of the Fenna-Matthews-Olson-sink and its reduced models were constructed.Based on the Hamiltonian,the evolutions of the populations of different BChls and the sink states was investigated by a hierarchical equation of motion approach.In order to observe the coherence between different states in the processes of energy transfer,the two-dimensional third-order photon echo spectra of the FennaMatthews-Olson and its reduced models in different waiting times were calculated.The results imply that for energy harvesting there are some redundant chromophores in the Fenna-Matthews-Olson complex.

关 键 词：二维光谱 能量传输 布居演化 相干性 Fenna-Matthews-Olson 

分 类 号：O433.4[机械工程—光学工程] O413.1[理学—光学]