Minhal Hasham - iCQD 2020 - Sub-bandgap modulation of quantum dot blinking statistics
Channel: WilsonLab ResearchTalks
Date: 2020-07-27

Minhal talks about our idea to use a sub-bandgap laser to perturb individual CdSe|ZnS quantum dots while we monitor their fluorescence. We figure out how to robustly distinguish the weak emission of a single quantum dot from the background laser scatter, which allows us to study 'blinking'---the curious, long-standing phenomenon by which the fluorescence from a single quantum dot erratically switches on and off. We examine the statistics of this process, and find something unexpected---not only does sub-bandgap optical modulation pervasively suppress long-duration ON events, it does so, statistically speaking, in a timescale-free manner.
Full paper here: https://pubs.acs.org/doi/pdf/10.1021/acs.jpclett.0c01599