Tuning Single Quantum Dot Emission with a Micromirror
Gangcheng Yuan, Daniel Gomez, Nicholas Kirkwood, Paul Mulvaney
NANO LETTERS | AMER CHEMICAL SOC | Published : 2018
The photoluminescence of single quantum dots fluctuates between bright (on) and dark (off) states, also termed fluorescence intermittency or blinking. This blinking limits the performance of quantum dot-based devices such as light-emitting diodes and solar cells. However, the origins of the blinking remain unresolved. Here, we use a movable gold micromirror to determine both the quantum yield of the bright state and the orientation of the excited state dipole of single quantum dots. We observe that the quantum yield of the bright state is close to unity for these single QDs. Furthermore, we also study the effect of a micromirror on blinking, and then evaluate excitation efficiency, biexciton..View full abstract
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Awarded by ARC
P.M. thanks the ARC for support through Grants DP130102134 and CE170100026. G.Y. thanks the University of Melbourne for MIFR and MIEA scholarships. D.E.G. thanks the ARC for funding through a Future Fellowship (FT140100514).