Zhang, W., You, J.-B., Liu, J., Xiong, X., Li, Z., Png, C. E., … Zhou, Z.-K. (2021). Steering Room-Temperature Plexcitonic Strong Coupling: A Diexcitonic Perspective. Nano Letters. doi:10.1021/acs.nanolett.1c02248
Abstract:
Plexcitonic strong coupling between a plasmon-polariton and a quantum emitter empowers ultrafast quantum manipulations in nanoscale under ambient conditions. Main body of previous studies deals with homogeneous quantum emitters. To enable multi-qubit states for future quantum computing and network, the strong coupling involving two excitons of the same material but different resonant energies has been investigated and observed primarily at very low temperature. Here, we report a room-temperature diexcitonic strong coupling (DiSC) nanosystem, in which the excitons of transition metal dichalcogenides monolayer and dye molecules are both strongly coupled to a single Au nanocube. Coherent information exchange in this DiSC nanosystem could be observed even when exciton energy detuning is about 5 times larger than their respective linewidths. The strong coupling behaviors in such DiSC nanosystem can be manipulated by tuning the plasmon resonant energies and the coupling strengths, opening up a paradigm of controlling plasmon-assisted coherent energy transfer.
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Funding Info:
This research / project is supported by the National Research Foundation Singapore - Quantum Engineering Programme
Grant Reference no. : QEP-SF1
This research / project is supported by the A*STAR - Career Development Award
Grant Reference no. : SC23/21-8007EP
This research / project is supported by the National Research Foundation (NRF) Singapore and the National Natural Science Foundation of China (NSFC) - Joint Grant
Grant Reference no. : NRF2017NRF-NSFC002-015
Key-Area Research and Development Program of Guangdong Province (2018B30329001), National Natural Science Foundation of China (11974437, 91750207), the Guangdong Special Support Program (2017TQ04C487, 2019JC05X397), Guangdong Natural Science Foundation (2020A0505140004), Open Fund of IPOC (BUPT) under Grant No. IPOC2019A003, and Fundamental Research Funds for the Central Universities, Sun Yat-sen University (20lgzd30)