Long-Range Fermi-Polaron Blockade in Monolayer MoSe$_2$
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866918528795279360 |
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| author | Peterson, Jonas Lahiri, Shibalik Tie, Monique Deng, Shibin Wang, Jierong Wang, Minxue Holtzman, Luke Hone, James Taniguchi, Takashi Watanabe, Kenji Heinz, Tony Walther, Valentin Huang, Libai |
| author_facet | Peterson, Jonas Lahiri, Shibalik Tie, Monique Deng, Shibin Wang, Jierong Wang, Minxue Holtzman, Luke Hone, James Taniguchi, Takashi Watanabe, Kenji Heinz, Tony Walther, Valentin Huang, Libai |
| contents | Strong optical nonlinearities at the few-photon level are a central goal for quantum photonics, yet they remain difficult to realize in solid-state systems. In doped two-dimensional semiconductors, coupling between excitons and a degenerate Fermi sea gives rise to exciton-Fermi polarons, many-body quasiparticles whose optical response is governed by fermionic correlations. Here, using femtosecond pump-probe transient absorption microscopy, we directly image the spatially resolved nonlinear optical response of exciton-Fermi polarons in monolayer MoSe$_2$. We observe a pronounced spatial suppression of resonant absorption associated with the attractive Fermi polaron, from which we extract an optical blockade radius that is more than ten times larger than that of the neutral exciton. Microscopic analysis indicates that this extended nonlinearity arises primarily from fermion-mediated interactions between exciton-Fermi polarons. Our results establish exciton-Fermi polarons in two-dimensional semiconductors as electrically tunable, strongly interacting optical quasiparticles, and identify them as a promising platform for ultralow-power nonlinear optical devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_29067 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Long-Range Fermi-Polaron Blockade in Monolayer MoSe$_2$ Peterson, Jonas Lahiri, Shibalik Tie, Monique Deng, Shibin Wang, Jierong Wang, Minxue Holtzman, Luke Hone, James Taniguchi, Takashi Watanabe, Kenji Heinz, Tony Walther, Valentin Huang, Libai Mesoscale and Nanoscale Physics Quantum Gases Strong optical nonlinearities at the few-photon level are a central goal for quantum photonics, yet they remain difficult to realize in solid-state systems. In doped two-dimensional semiconductors, coupling between excitons and a degenerate Fermi sea gives rise to exciton-Fermi polarons, many-body quasiparticles whose optical response is governed by fermionic correlations. Here, using femtosecond pump-probe transient absorption microscopy, we directly image the spatially resolved nonlinear optical response of exciton-Fermi polarons in monolayer MoSe$_2$. We observe a pronounced spatial suppression of resonant absorption associated with the attractive Fermi polaron, from which we extract an optical blockade radius that is more than ten times larger than that of the neutral exciton. Microscopic analysis indicates that this extended nonlinearity arises primarily from fermion-mediated interactions between exciton-Fermi polarons. Our results establish exciton-Fermi polarons in two-dimensional semiconductors as electrically tunable, strongly interacting optical quasiparticles, and identify them as a promising platform for ultralow-power nonlinear optical devices. |
| title | Long-Range Fermi-Polaron Blockade in Monolayer MoSe$_2$ |
| topic | Mesoscale and Nanoscale Physics Quantum Gases |
| url | https://arxiv.org/abs/2605.29067 |