期刊
ADVANCED OPTICAL MATERIALS
卷 10, 期 9, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adom.202102380
关键词
exciton-plasmon coupling; excitons; phase delay; plasmonic modes
资金
- National Key Research and Development Program of China [2018YFB2200401]
- National Natural Science Foundation of China [91950111, 61521004, 11527901]
This study reveals the significant influence of plasmonic phase delay on the asymmetrical spectrum line shape of a plasmon-exciton coupling system. The phase effect was demonstrated in a hybrid system consisting of monolayer WSe2 and a gold nanorod, and it was found that the phase delay can modulate the intensity of the coupling modes.
Manipulating plasmon-exciton coupling is a pivotal desire for many potential applications. Here, it is found that the plasmonic phase delay can modulate the interference-induced asymmetrical spectrum line shape of the plasmon-exciton coupling system considerably. The phase effect in a hybrid system consisting of monolayer WSe2 and an individual gold nanorod is demonstrated. The phase delay can modulate the relative intensities of the coupling modes but not the splitting energy, effective in both weak and strong coupling regimes. There is an excellent agreement between the numerical calculations and the experimental results. The findings reveal that the local phase delay can act as an effective way to manipulate plasmon-exciton coupling properties at the nanoscale.
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