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Average Arrival Time: an Alternative Approach for Studying Fluorescent Behavior of Single Quantum Dots
Yong-lei Sun1, Jing Zhao1,2
1.Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, USA;2.Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, USA
Abstract:
Due to photoluminescence intermittency of single colloidal quantum dots (QDs), the traditional exponential fluorescence lifetime analysis is not perfect to characterize QDs' fluorescent emission behavior. In this work we used the time-tagged time-resolved (TTTR) mode to record the fluorescent photons from single QDs. We showed that this method is compatible with the traditional lifetime analysis. In addition, by constructing the trajectory over time and the distribution of average arrival time (AAT) of the fluorescent photons, more details about the emission behavior of QDs were revealed.
Key words:  Quantum dots  Fluorescence lifetime  Time-tagged time-resolved mode  Average arrival time
FundProject:This work was supported by the National Science Foundation CAREER award (CHE-1554800).
平均探测时间:研究单个量子点荧光现象的另一种思路
孙咏雷1, 赵晶1,2
1.美国康涅狄格大学材料科学研究院, 康涅狄格州, 斯托斯 06269;2.美国康涅狄格大学化学系, 康涅狄格州, 斯托斯 06269
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DOI:10.1063/1674-0068/31/cjcp1806149
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