Stimulated Exciton–Polariton Scattering in Hybrid Halide Perovskites

Halide perovskites such as methylammonium lead bromide (MAPbBr3) host tightly bound three-dimensional excitons that are robust at room temperature. The excellent optical properties of MAPbBr3 allow the design of optical single-mode waveguides and cavities in the frequency range close to excitonic transitions. Taken together, these results indicate that MAPbBr3 is an excellent platform for probing exciton–polariton nonlinear phenomena at room temperature. Here, we investigate the ultrafast nonequilibrium dynamics of polaritons under nonresonant femtosecond-pulsed excitation. We demonstrate the presence of a stimulated acoustic phonon-assisted scattering regime above the threshold pump fluence, characterized by the explosive growth of emission intensity, a redshift of the emission spectral maximum, spectral narrowing, and subpicosecond emission dynamics. Our theoretical findings are confirmed by experimental measurements.

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Publication Details

Journal
ACS Photonics
Published
2025-02-03
DOI
https://doi.org/10.1021/acsphotonics.4c01756
Citations
1
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
0.73

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article

Stimulated Exciton–Polariton Scattering in Hybrid Halide Perovskites

A. K. Samusev, Mikhail Masharin, V. Shahnazaryan, I. Yu. Chestnov et al.
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ACS Photonics
Perovskite Materials and Applications
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article

Stimulated Exciton–Polariton Scattering in Hybrid Halide Perovskites

A. K. Samusev, Mikhail Masharin, V. Shahnazaryan, I. Yu. Chestnov, Ivan Iorsh, V. I. Kondratyev, Anatoly P. Pushkarev, I. A. Shelykh, Sergey Makarov
article en
1 citations

Abstract

Halide perovskites such as methylammonium lead bromide (MAPbBr3) host tightly bound three-dimensional excitons that are robust at room temperature. The excellent optical properties of MAPbBr3 allow the design of optical single-mode waveguides and cavities in the frequency range close to excitonic transitions. Taken together, these results indicate that MAPbBr3 is an excellent platform for probing exciton–polariton nonlinear phenomena at room temperature. Here, we investigate the ultrafast nonequilibrium dynamics of polaritons under nonresonant femtosecond-pulsed excitation. We demonstrate the presence of a stimulated acoustic phonon-assisted scattering regime above the threshold pump fluence, characterized by the explosive growth of emission intensity, a redshift of the emission spectral maximum, spectral narrowing, and subpicosecond emission dynamics. Our theoretical findings are confirmed by experimental measurements.

ACS PhotonicsVol. 12(2)
Harbin Engineering University (CN), University of Iceland (IS), ITMO University (RU), TU Dortmund University (DE), Queen's University (CA), Center for Theoretical Physics (PL), Astronomy and Space (AU), École Polytechnique Fédérale de Lausanne (CH)
Basis Foundation, Ministry of Science and Higher Education of the Russian Federation, ITMO University
Openalex Percentile: Top 32%
Perovskite Materials and Applications
0.73
DOISourceOpenAlex
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