Room-Temperature Polariton Lasing from CdSe core-only Nanoplatelets

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...

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Bibliographic Details
Published in:arXiv.org 2024-04
Main Authors: Freire-Fernández, Francisco, Sinai, Nathan G, Tan, Max J H, Sang-Min, Park, Koessler, Eric, Krauss, Todd D, Huo, Pengfei, Odom, Teri W
Format: Article
Language:English
Subjects:
Chemical reactions
Data processing
Excitons
Lasing
Lattices
Optoelectronics
Platelets (materials)
Polaritons
Quantum phenomena
Room temperature
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Summary: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.
ISSN:2331-8422