室温单分子偶极取向与量子化再取向动力学实验研究  

Experiment study of orientation and reorientation quantum dynamics of single dye molecules at room temperature

作　　者：张国峰[1] 张芳[1] 程峰钰[1] 孙建虎[1] 肖连团[1] 贾锁堂[1] 

机构地区：[1]山西大学物理电子工程学院,量子光学与光量子器件国家重点实验室,太原030006

出　　处：《物理学报》2009年第4期2364-2368,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10674086);国家重点基础研究发展计划(批准号:2006CB921603;2006CB921102);国家基础科学人才培养基金(批准号:J0730317);教育部新世纪优秀人才支持计划(批准号:NCET-06-0259);山西省自然科学基金(批准号:2007011006);山西省青年学术带头人基金资助的课题~~

摘　　要：对室温下染料单分子进行了偶极取向和偶极再取向动力学的实验研究.利用共焦扫描显微镜光学系统与荧光偏振探测分析相结合的方法分别测量了聚合体薄膜中的单分子和无聚合体薄膜的单分子偶极方向变化特性,经采样统计测量镶嵌于聚合体薄膜中的单分子发生偶极再取向的概率约为5%—9%,无聚合体薄膜的单分子发生偶极再取向的概率约为26%.通过测量单分子荧光的偏振度轨迹曲线发现,偶极再取向存在着在多个偏振态之间的量子化跳跃行为.We have studied experimentally the dipole orientation and reorientation dynamics of single dye molecules at room temperature.The dipole rotation of individual dye molecules which are physisorbed to glass and embedded in spin-cast polymer films is measured with the confocal scanning optical microscopy and the method of fluorescence polarization analysis,the probability of reorientation of single molecules found to be about 5%—9% when embedded in polymer,and about 26% when absorbed to glass by using the statistic analysis.It is found the quantum jumps for molecule dipole reorientation are distributed in several different polarization states by measuring the polarization degree of fluorescent photons.

关 键 词：单分子 偶极取向 再取向 量子化跳跃 

分 类 号：O561[理学—原子与分子物理]