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- W4386554920 abstract "Controlling the relaxation dynamics of excitons is key to improve the efficiencies of semiconductor--based applications. Confined semiconductor nanocrystals (NCs) offer additional handles to control the properties of excitons, for example, by changing the size or the shape of the NC, resulting in a mismatch between the excitonic gaps and the phonon frequencies. This has led to the hypothesis of a significant slowing down of exciton relaxation in strongly confined NC, but in practice due to increasing exciton--phonon coupling and rapid multiphonon relaxation channels, the relaxation of excitons depends only weakly on the size or shape of the NC. In this work, we focus on elucidating the nonradiative relaxation of excitons in NC placed in an optical cavity. We find that as the cavity photon energy decreases and/or the cavity--exciton coupling increases, the relaxation to thermal equilibrium is significantly slowed down, resulting in a polariton--induced phonon bottleneck, with relaxation timescales that are slower by orders of magnitude compared to the cavity--free case." @default.
- W4386554920 created "2023-09-09" @default.
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- W4386554920 date "2023-09-06" @default.
- W4386554920 modified "2023-10-06" @default.
- W4386554920 title "Polaritonic Bottleneck in Colloidal Quantum Dots" @default.
- W4386554920 doi "https://doi.org/10.48550/arxiv.2309.03399" @default.
- W4386554920 hasPublicationYear "2023" @default.
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