| ATOMIC AND MOLECULAR PHYSICS |
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Lower Exciton Number Strong Light Matter Interaction in Plasmonic Tweezers |
| Yun-Fei Zou1,2 and Li Yu1,2* |
1School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China
2State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
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| Cite this article: |
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Yun-Fei Zou and Li Yu 2021 Chin. Phys. Lett. 38 023301 |
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Abstract The plasmonic nanocavity is an excellent platform for the study of light matter interaction within a sub-diffraction volume under ambient conditions. We design a structure of plasmonic tweezers, which can trap molecular J-aggregates and also serve as a plasmonic cavity with which to investigate strong light matter interaction. The optical response of the cavity is calculated via finite-difference time-domain methods, and the optical force is evaluated based on the Maxwell stress tensor method. With the help of the coupled oscillator model and virtual exciton theory, we investigate the strong coupling progress at the lower level of excitons, finding that a Rabi splitting of 230 meV can be obtained in a single exciton system. We further analyze the relationship between optical force and model volume in the coupling system. The proposed method offers a way to locate molecular J-aggregates in plasmonic tweezers for investigating optical force performance and strong light matter interaction.
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Received: 23 September 2020
Published: 27 January 2021
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| PACS: |
11.15.Me
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(Strong-coupling expansions)
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37.10.Pq
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(Trapping of molecules)
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73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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| Fund: Supported by the National Key Research and Development Program of China (Grant No. 2016YFA0301300), the Fundamental Research Funds for the Central Universities (Grant No. 2019XD-A09), and the National Natural Science Foundation of China (Grant No. 11574035). |
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