Ultrafast Exciton-Polariton Transport and Relaxation in Halide Perovskite
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911345045143552 |
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| author | Xia, Yuexing Liang, Yin Zhang, Zhiyong Lan, Tian Bao, Xiaotian Zhang, Yuyang Zeng, Xin Gong, Yiyang Yue, Shuai Du, Wenna Fu, Jianhui Su, Rui Schumacher, Stefan Ma, Xuekai Zhang, Qing Liu, Xinfeng |
| author_facet | Xia, Yuexing Liang, Yin Zhang, Zhiyong Lan, Tian Bao, Xiaotian Zhang, Yuyang Zeng, Xin Gong, Yiyang Yue, Shuai Du, Wenna Fu, Jianhui Su, Rui Schumacher, Stefan Ma, Xuekai Zhang, Qing Liu, Xinfeng |
| contents | Halide perovskites offer a great platform for room-temperature exciton-polaritons (EPs) due to their strong oscillator strength and large exciton binding energy, promising applications in next-generation photonic and polaritonic devices. Efficient manipulation of EP transport and relaxation is critical for device performance, yet their spatiotemporal dynamics across different in-plane momenta (k//) remain poorly understood due to limitations in experimental access. In this work, we employ energy-resolved transient reflectance microscopy (TRM) combined with the dispersion relation of EPs to achieve high-resolution imaging of EP transport at specific k//. This approach directly reveals the quasi-ballistic transport and ultrafast relaxation of EPs in different k// regions, showcasing diffusion as fast as ~490 cm2/s and a relaxation time of ~95.1 fs. Furthermore, by tuning the detuning parameter, we manipulate the ballistic transport group velocity and relaxation time of EPs across varying k//. Our results reveal key insights into the dynamics of EP transport and relaxation, providing valuable guidance for the design and optimization of polaritonic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_23955 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ultrafast Exciton-Polariton Transport and Relaxation in Halide Perovskite Xia, Yuexing Liang, Yin Zhang, Zhiyong Lan, Tian Bao, Xiaotian Zhang, Yuyang Zeng, Xin Gong, Yiyang Yue, Shuai Du, Wenna Fu, Jianhui Su, Rui Schumacher, Stefan Ma, Xuekai Zhang, Qing Liu, Xinfeng Materials Science Halide perovskites offer a great platform for room-temperature exciton-polaritons (EPs) due to their strong oscillator strength and large exciton binding energy, promising applications in next-generation photonic and polaritonic devices. Efficient manipulation of EP transport and relaxation is critical for device performance, yet their spatiotemporal dynamics across different in-plane momenta (k//) remain poorly understood due to limitations in experimental access. In this work, we employ energy-resolved transient reflectance microscopy (TRM) combined with the dispersion relation of EPs to achieve high-resolution imaging of EP transport at specific k//. This approach directly reveals the quasi-ballistic transport and ultrafast relaxation of EPs in different k// regions, showcasing diffusion as fast as ~490 cm2/s and a relaxation time of ~95.1 fs. Furthermore, by tuning the detuning parameter, we manipulate the ballistic transport group velocity and relaxation time of EPs across varying k//. Our results reveal key insights into the dynamics of EP transport and relaxation, providing valuable guidance for the design and optimization of polaritonic devices. |
| title | Ultrafast Exciton-Polariton Transport and Relaxation in Halide Perovskite |
| topic | Materials Science |
| url | https://arxiv.org/abs/2512.23955 |