Extreme electron-photon interaction in perovskite glass
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866913345774288896 |
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| author | Kharintsev, S. S. Battalova, E. I. Matchenya, I. A. Marunchenko, A. A. Pushkarev, A. P. |
| author_facet | Kharintsev, S. S. Battalova, E. I. Matchenya, I. A. Marunchenko, A. A. Pushkarev, A. P. |
| contents | The interaction of light with solids can be dramatically enhanced owing to electron-photon momentum matching. This mechanism is driven by either quantum confinement or long-range structural correlations in media with crystal-liquid duality. In this paper, we address a new strategy based on both phenomena for enhancement of the light-matter interaction in a direct bandgap semiconductor - lead halide perovskite CsPbBr$_3$ - by using electric pulse-driven structural disorder. The disordered (glassy) state allows the generation of confined photons, and the formation of an electronic continuum of static/dynamic defect states across the forbidden gap (Urbach bridge). Both mechanisms underlie photon-momentum-enabled electronic Raman scattering (ERS) and single-photon anti-Stokes photoluminescence (PL) under sub-band pump. PL/ERS blinking is discussed to be associated with thermal fluctuations of cross-linked [PbBr$_6$]$^{4-}$ octahedra. Time-delayed synchronization of PL/ERS blinking causes enhanced spontaneous emission at room temperature. Our findings indicate the role of photon momentum in enhanced light-matter interactions in disordered and nanostructured solids. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_06084 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Extreme electron-photon interaction in perovskite glass Kharintsev, S. S. Battalova, E. I. Matchenya, I. A. Marunchenko, A. A. Pushkarev, A. P. Optics The interaction of light with solids can be dramatically enhanced owing to electron-photon momentum matching. This mechanism is driven by either quantum confinement or long-range structural correlations in media with crystal-liquid duality. In this paper, we address a new strategy based on both phenomena for enhancement of the light-matter interaction in a direct bandgap semiconductor - lead halide perovskite CsPbBr$_3$ - by using electric pulse-driven structural disorder. The disordered (glassy) state allows the generation of confined photons, and the formation of an electronic continuum of static/dynamic defect states across the forbidden gap (Urbach bridge). Both mechanisms underlie photon-momentum-enabled electronic Raman scattering (ERS) and single-photon anti-Stokes photoluminescence (PL) under sub-band pump. PL/ERS blinking is discussed to be associated with thermal fluctuations of cross-linked [PbBr$_6$]$^{4-}$ octahedra. Time-delayed synchronization of PL/ERS blinking causes enhanced spontaneous emission at room temperature. Our findings indicate the role of photon momentum in enhanced light-matter interactions in disordered and nanostructured solids. |
| title | Extreme electron-photon interaction in perovskite glass |
| topic | Optics |
| url | https://arxiv.org/abs/2405.06084 |