飞秒差异吸收微弱信号测量技术  

FEMTOSECOND DIFFERENCE ABSORPTIVE FAINT SIGNAL MEASUREMENT TECHNOLOGY

作　　者：贺俊芳[1] 王水才[1] 杨鸿儒[1] 

机构地区：[1]中国科学院西安光学精密机械研究所瞬态光学技术国家重点实验室,西安710068

出　　处：《光子学报》1999年第10期888-891,共4页Acta Photonica Sinica

基　　金：国家攀登计划;973国家重点基础研究发展规划

摘　　要：本文报道一种用飞秒差异吸收光谱装置探测光合作用光系统Ⅱ（PSⅡ）颗粒复合物电子传递、电荷分离、能量传递技术，装置的时间分辨率小于120fs，光谱调谐范围为720～860nm，采用低温双探头Boxcar平均处理器进行信息采集处理，测得了PSⅡ颗粒复合物3．2±0．3Ps的P680*Pheo到P680＋Pheo－的电荷分离时间，还获得了由外周天线到内周天线CP43和CP47，再到PSⅡ反应中心的能量传递时间25ps，以及电荷分离后的能量衰变时间37．2ps．In this letter,a technology to detect electron transfer, charge separdte,energy, transfeer in photosynthesis photosystem Ⅱ (PS Ⅱ ) particle compounds by a femtosecond ditference absorptivespectra setup is reported. The setup has time resolution ＜ 120fs and spectra tune scale 720～ 860nm.Two low temperature detectors and Boxcar average processor were used to collect and dispose datum.In the PS Ⅱ particle compounds 3. 2±0. 3ps charge separate time from P680* Pheo to P68O+Pheo-,energy transfer time 25ps from external antenna to internal antenna,then to PS Ⅱ reaction center,andenergy delay constant 37. 2ps after charge separate were detected.

关 键 词：超快光谱 PSⅡ 能量传递 飞秒差异 吸收光谱 

分 类 号：TN789.1[电子电信—电路与系统] O433.51[机械工程—光学工程]