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Spectrally narrow optical resonances can be used to generate slow light, i.e., a large reduction in the group velocity. In a previous work, we developed hybrid 2D semiconductor plasmonic structures, which consist of propagating optical frequency surface-plasmon polaritons (SPPs) interacting with excitons in a semiconductor monolayer layer. In this work, we utilize coherent population oscillations of coupled exciton-SPPs in monolayer WSe2 to demonstrate slow light, a ~600 fold decrease of the group velocity. Specifically, we use a two-color laser technique where the coupling between the two laser fields gives rise to a narrow ~3 µeV coherent population oscillation resonances, that result in a group velocity on order of 105 m/s. Our work paves the way toward on-chip actively switched delay lines and optical buffers that utilize 2D semiconductors.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Optical resonances, slow light, surface-plasmon polaritons

刊行年月日: 2022-10-20

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 13 issue. 1 6216

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-022-33965-8

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更新時刻: 2025-02-27 08:31:08 +0900

MDRでの公開時刻: 2025-02-27 08:31:08 +0900