Direct observation of split-mode exciton-polaritons in a single MoS$_2$ nanotube
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866910297740017664 |
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| author | Galimov, A. I. Kazanov, D. R. Poshakinskiy, A. V. Rakhlin, M. V. Eliseyev, I. A. Toropov, A. A. Remskar, M. Shubina, T. V. |
| author_facet | Galimov, A. I. Kazanov, D. R. Poshakinskiy, A. V. Rakhlin, M. V. Eliseyev, I. A. Toropov, A. A. Remskar, M. Shubina, T. V. |
| contents | A single nanotube synthesized from a transition metal dichalcogenide (TMDC) exhibits strong exciton resonances and, in addition, can support optical whispering gallery modes. This combination is promising for observing exciton-polaritons without an external cavity. However, traditional energy-momentum-resolved detection methods are unsuitable for this tiny object. Instead, we propose to use split optical modes in a twisted nanotube with the flattened cross-section, where a gradually decreasing gap between the opposite walls leads to a change in mode energy, similar to the effect of the barrier width on the eigenenergies in the double-well potential. Using micro-reflectance spectroscopy, we investigated the rich pattern of polariton branches in single MoS$_2$ tubes with both variable and constant gaps. Observed Rabi splitting in the 40 - 60 meV range is comparable to that for a MoS$_2$ monolayer in a microcavity. Our results, based on the polariton dispersion measurements and polariton dynamics analysis, present a single TMDC nanotube as a perfect polaritonic structure for nanophotonics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2401_00348 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Direct observation of split-mode exciton-polaritons in a single MoS$_2$ nanotube Galimov, A. I. Kazanov, D. R. Poshakinskiy, A. V. Rakhlin, M. V. Eliseyev, I. A. Toropov, A. A. Remskar, M. Shubina, T. V. Mesoscale and Nanoscale Physics Materials Science A single nanotube synthesized from a transition metal dichalcogenide (TMDC) exhibits strong exciton resonances and, in addition, can support optical whispering gallery modes. This combination is promising for observing exciton-polaritons without an external cavity. However, traditional energy-momentum-resolved detection methods are unsuitable for this tiny object. Instead, we propose to use split optical modes in a twisted nanotube with the flattened cross-section, where a gradually decreasing gap between the opposite walls leads to a change in mode energy, similar to the effect of the barrier width on the eigenenergies in the double-well potential. Using micro-reflectance spectroscopy, we investigated the rich pattern of polariton branches in single MoS$_2$ tubes with both variable and constant gaps. Observed Rabi splitting in the 40 - 60 meV range is comparable to that for a MoS$_2$ monolayer in a microcavity. Our results, based on the polariton dispersion measurements and polariton dynamics analysis, present a single TMDC nanotube as a perfect polaritonic structure for nanophotonics. |
| title | Direct observation of split-mode exciton-polaritons in a single MoS$_2$ nanotube |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2401.00348 |