Uncovering temperature-dependent exciton-polariton relaxation mechanisms in hybrid organic-inorganic perovskites
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s41467-023-37772-7.pdf
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Published version
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3.57 MB
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Author(s)
Laitz, Madeleine
Kaplan, Alexander EK
Deschamps, Jude
Barotov, Ulugbek
Proppe, Andrew H
García-Benito, Inés
Osherov, Anna
Grancini, Giulia
deQuilettes, Dane W
Nelson, Keith A
Date Issued
April 27, 2023
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Laitz, M., Kaplan, A.E.K., Deschamps, J. et al. Uncovering temperature-dependent exciton-polariton relaxation mechanisms in hybrid organic-inorganic perovskites. Nat Commun 14, 2426 (2023).
Version
Final published version
Abstract
Hybrid perovskites have emerged as a promising material candidate for
exciton-polariton (polariton) optoelectronics. Thermodynamically, lowthreshold Bose-Einstein condensation requires efficient scattering to the
polariton energy dispersion minimum, and many applications demand precise
control of polariton interactions. Thus far, the primary mechanisms by which
polaritons relax in perovskites remains unclear. In this work, we perform
temperature-dependent measurements of polaritons in low-dimensional perovskite wedged microcavities achieving a Rabi splitting of _ΩRabi = 260 ±
5 meV. We change the Hopfield coefficients by moving the optical excitation
along the cavity wedge and thus tune the strength of the primary polariton
relaxation mechanisms in this material. We observe the polariton bottleneck
regime and show that it can be overcome by harnessing the interplay between
the different excitonic species whose corresponding dynamics are modified by
strong coupling. This work provides an understanding of polariton relaxation
in perovskites benefiting from efficient, material-specific relaxation pathways
and intracavity pumping schemes from thermally brightened excitonic
species.
Description
Springer Science and Business Media LLC
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
10.1038/s41467-023-37772-7
