Strong Coupling beyond the High-Q Limit and Linewidth Narrowing in a Multi-Exciton Planar Microcavity
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| Main Authors: | , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908892120743936 |
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| author | Cerda-Méndez, E. A. Rubo, Y. G. Biermann, K. Camacho-Guardian, A. Kuznetsov, A. S. Santos, P. V. |
| author_facet | Cerda-Méndez, E. A. Rubo, Y. G. Biermann, K. Camacho-Guardian, A. Kuznetsov, A. S. Santos, P. V. |
| contents | We systematically study the linewidths of multilevel exciton-polariton modes as a function of the detuning in a planar hybrid microcavity (MC) with low quality factor (Q~300) operating in the linear optical response regime. Using optical reflectivity, we observe that, counterintuitively, the linewidths of the polariton modes undergo a pronounced spectral narrowing as detuning is reduced. Using optical reflectivity, we observe that, counterintuitively, the linewidths of the polariton modes undergo a pronounced spectral narrowing as detuning is reduced. By benchmarking the experimental results against three commonly used constant-loss theoretical descriptions, we find that this behavior is only partially reproduced, highlighting limitations of conventional strong-coupling models when applied to non-standard MC architectures. Our results suggest that frequency-dependent self-energy effects or correlated dissipation mechanisms, typically neglected in simplified treatments, may play an important role. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2510_22163 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Strong Coupling beyond the High-Q Limit and Linewidth Narrowing in a Multi-Exciton Planar Microcavity Cerda-Méndez, E. A. Rubo, Y. G. Biermann, K. Camacho-Guardian, A. Kuznetsov, A. S. Santos, P. V. Optics Mesoscale and Nanoscale Physics We systematically study the linewidths of multilevel exciton-polariton modes as a function of the detuning in a planar hybrid microcavity (MC) with low quality factor (Q~300) operating in the linear optical response regime. Using optical reflectivity, we observe that, counterintuitively, the linewidths of the polariton modes undergo a pronounced spectral narrowing as detuning is reduced. Using optical reflectivity, we observe that, counterintuitively, the linewidths of the polariton modes undergo a pronounced spectral narrowing as detuning is reduced. By benchmarking the experimental results against three commonly used constant-loss theoretical descriptions, we find that this behavior is only partially reproduced, highlighting limitations of conventional strong-coupling models when applied to non-standard MC architectures. Our results suggest that frequency-dependent self-energy effects or correlated dissipation mechanisms, typically neglected in simplified treatments, may play an important role. |
| title | Strong Coupling beyond the High-Q Limit and Linewidth Narrowing in a Multi-Exciton Planar Microcavity |
| topic | Optics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.22163 |