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5 October 2023 Plasmon-(2D exciton) interactions
Jianfang Wang
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Proceedings Volume PC12654, Enhanced Spectroscopies and Nanoimaging 2023; PC126540M (2023) https://doi.org/10.1117/12.2676587
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Excitons in two-dimensional transition metal dichalcogenides (2D TMDCs) exhibit extraordinarily rich properties and offer enormous opportunities for the development of a variety of photonic, optoelectronic, and quantum devices. To fully utilize the rich properties of the 2D excitons, the development of effective means for control of their emission performances is highly desired. Plasmonic nanostructures possess large scattering and absorption cross-sections at their plasmon resonance wavelengths. They can concentrate light down to the nanometer region. Their plasmon wavelengths can be synthetically adjusted over a broad spectral region. Plasmonic nanostructures therefore offer an attractive and powerful means for the manipulation of the 2D excitons. In the recent years, we have made great effort on understanding the interaction between localized plasmons and the 2D excitons as well as on the control of the 2D excitons. We have observed strong coupling between magnetic plasmons and the 2D excitons in (Au nanocup)-on-(WSe2 monolayer/multilayer) hybrid structures. We have created localized strain on WS2 monolayer and detected the emissions from the localized 2D excitons. We have further constructed high-quality Fabry–Pérot nanoresonators by use of circular Au nanodisks supported on WS2 flakes. The cavity modes can strongly modulate the exciton emissions from the WS2 flaks.
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Jianfang Wang "Plasmon-(2D exciton) interactions", Proc. SPIE PC12654, Enhanced Spectroscopies and Nanoimaging 2023, PC126540M (5 October 2023); https://doi.org/10.1117/12.2676587
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KEYWORDS
Excitons
Plasmons
2D materials
Quantum control
Gold
Materials properties
Quantum plasmonics
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