Non-Hermitian trapping of Dirac exciton-polariton condensates in a perovskite metasurface
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914192607412224 |
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| author | Masharin, Mikhail Chestnov, Igor Bochin, Andrey Kozhevin, Pavel Shahnazaryan, Vanik Yulin, Alexey Iorsh, Ivan Ma, Xuekai Schumacher, Stefan Makarov, Sergey Samusev, Anton Nalitov, Anton |
| author_facet | Masharin, Mikhail Chestnov, Igor Bochin, Andrey Kozhevin, Pavel Shahnazaryan, Vanik Yulin, Alexey Iorsh, Ivan Ma, Xuekai Schumacher, Stefan Makarov, Sergey Samusev, Anton Nalitov, Anton |
| contents | Massless Dirac particles avoid trapping due to their exceptional tunneling properties manifested in the so-called Klein paradox. This conclusion stems from the conservative treatment, but so far, it has not been extended to a non-Hermitian framework. Recently, driven-dissipative bosonic condensation of Dirac exciton-polaritons was demonstrated in metasurface waveguides. Here, we report an experimental observation of spatial binding and energy quantization of Dirac exciton-polaritons in a halide perovskite metasurface. A combination of spatially profiled nonresonant optical excitation and exciton-polariton interaction forms an effective non-Hermitian complex potential responsible for the observed effect. In the case of tightly focused pump spots spanning from 9 to 17~$μ$m, several bound states simultaneously achieve macroscopic occupation, constituting a multi-mode bosonic condensation of exciton-polaritons. Our theoretical analysis based on the driven-dissipative extension of the Dirac equation reveals that the non-Hermitian character of the effective trap allows for confinement even in the case of the gapless Dirac-like photonic dispersion, both above and below the energy of the dispersion crossing. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2512_09603 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Non-Hermitian trapping of Dirac exciton-polariton condensates in a perovskite metasurface Masharin, Mikhail Chestnov, Igor Bochin, Andrey Kozhevin, Pavel Shahnazaryan, Vanik Yulin, Alexey Iorsh, Ivan Ma, Xuekai Schumacher, Stefan Makarov, Sergey Samusev, Anton Nalitov, Anton Mesoscale and Nanoscale Physics Massless Dirac particles avoid trapping due to their exceptional tunneling properties manifested in the so-called Klein paradox. This conclusion stems from the conservative treatment, but so far, it has not been extended to a non-Hermitian framework. Recently, driven-dissipative bosonic condensation of Dirac exciton-polaritons was demonstrated in metasurface waveguides. Here, we report an experimental observation of spatial binding and energy quantization of Dirac exciton-polaritons in a halide perovskite metasurface. A combination of spatially profiled nonresonant optical excitation and exciton-polariton interaction forms an effective non-Hermitian complex potential responsible for the observed effect. In the case of tightly focused pump spots spanning from 9 to 17~$μ$m, several bound states simultaneously achieve macroscopic occupation, constituting a multi-mode bosonic condensation of exciton-polaritons. Our theoretical analysis based on the driven-dissipative extension of the Dirac equation reveals that the non-Hermitian character of the effective trap allows for confinement even in the case of the gapless Dirac-like photonic dispersion, both above and below the energy of the dispersion crossing. |
| title | Non-Hermitian trapping of Dirac exciton-polariton condensates in a perovskite metasurface |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2512.09603 |