Exciton-polariton stimulated scattering in hybrid halide perovskites
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866929430641770496 |
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| author | Chestnov, Igor Masharin, Mikhail Kondratyev, Valeriy Iorsh, Ivan Samusev, Anton Pushkarev, Anatoly Makarov, Sergey Shelykh, Ivan A. Shahnazaryan, Vanik |
| author_facet | Chestnov, Igor Masharin, Mikhail Kondratyev, Valeriy Iorsh, Ivan Samusev, Anton Pushkarev, Anatoly Makarov, Sergey Shelykh, Ivan A. Shahnazaryan, Vanik |
| contents | Halide perovskites, such as methylammonium lead bromide (MAPbBr$_3$), host tightly bound three-dimensional excitons which are robust at room temperature. Excellent optical properties of MAPbBr$_3$ allow for designing of optical single-mode waveguides and cavities in the frequency range close to the excitonic transitions. Taken together, this turns MAPbBr$_3$ into an excellent platform for probing exciton-polariton nonlinear phenomena at room temperature. Here we investigate ultrafast non-equilibrium dynamics of polaritons under pulsed fs non-resonant excitation. We demonstrate the presence of the stimulated acoustic phonon-assisted scattering regime above threshold pump fluence, characterized by the explosive growth of emission intensity, a redshift of the emission spectral maximum, spectral narrowing, and sub-picosecond emission dynamics. Our theoretical findings are well confirmed by the results of experimental measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_15709 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Exciton-polariton stimulated scattering in hybrid halide perovskites Chestnov, Igor Masharin, Mikhail Kondratyev, Valeriy Iorsh, Ivan Samusev, Anton Pushkarev, Anatoly Makarov, Sergey Shelykh, Ivan A. Shahnazaryan, Vanik Materials Science Mesoscale and Nanoscale Physics Halide perovskites, such as methylammonium lead bromide (MAPbBr$_3$), host tightly bound three-dimensional excitons which are robust at room temperature. Excellent optical properties of MAPbBr$_3$ allow for designing of optical single-mode waveguides and cavities in the frequency range close to the excitonic transitions. Taken together, this turns MAPbBr$_3$ into an excellent platform for probing exciton-polariton nonlinear phenomena at room temperature. Here we investigate ultrafast non-equilibrium dynamics of polaritons under pulsed fs non-resonant excitation. We demonstrate the presence of the stimulated acoustic phonon-assisted scattering regime above threshold pump fluence, characterized by the explosive growth of emission intensity, a redshift of the emission spectral maximum, spectral narrowing, and sub-picosecond emission dynamics. Our theoretical findings are well confirmed by the results of experimental measurements. |
| title | Exciton-polariton stimulated scattering in hybrid halide perovskites |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2407.15709 |