Room-Temperature Polariton Lasing from CdSe core-only Nanoplatelets
arxiv(2024)
摘要
This paper reports how CdSe core-only nanoplatelets coupled with plasmonic Al
nanoparticle lattices can exhibit exciton-polariton lasing. By improving a
procedure to synthesize monodisperse 4-monolayer CdSe nanoplatelets, we could
resolve polariton decay dynamics and pathways. Experiment and theory confirmed
that the system is in the strong coupling regime based on anti-crossings in the
dispersion diagrams and magnitude of the Rabi splitting values. Notably,
polariton lasing is observed only for cavity lattice periodicities that exhibit
specific dispersive characteristics that enable polariton accumulation. The
threshold of polariton lasing is 25-fold lower than reported photon lasing
values from CdSe nanoplatelets in similar cavity designs. This open-cavity
platform offers a simple approach to control exciton polaritons anticipated to
benefit quantum information processing, optoelectronics, and chemical
reactions.
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