期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 11, 期 12, 页码 4631-4638出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.0c01080
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资金
- National Natural Science Foundation of China [91833303, 11621101, 61774131, 61875174]
- National Key Research and Development Program of China [2017YFA0205700]
- Zhejiang Provincial Natural Science Foundation of China [LY17F010006]
Room-temperature strong coupling between quasi-bound states in the continuum (q-BIC) of a silicon nitride metasurface and excitons in a WS2 monolayer is investigated in detail by both numerical simulations and theoretical calculations. The strong coupling between the q-BIC mode and excitons leads to a remarkable spectral splitting and typical anticrossing behavior of the Rabi splitting, which can be realized in the absorption spectra by varying the grating thickness and asymmetry parameter of the silicon-nitride metasurface, respectively. In addition, both the line width of the q-BIC mode and local electric field enhancement are found to affect the strong coupling, which needs to be considered in detail in q-BIC metasurface designs. This work provides a possible way to enhance light-matter interactions in transition metal dichalcogenides monolayers and pave the way for future quantum and nanophotonic applications.
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