期刊
ACS PHOTONICS
卷 5, 期 4, 页码 1281-1287出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.7b01032
关键词
chiral coupling; transition metal dichalcogenide monolayer; surface plasmons; valley polarization and coherence; optical spin-orbit interaction; plasmonic spin-momentum locking
类别
资金
- ANR Equipex Union [ANR-10-EQPX-52-01]
- ANR Grant [I-12DH ANR-15-CE24-0016]
- Labex NIE projects [ANR-11-LABX-0058-NIE]
- USIAS within the Investissement d'Avenir program [ANR-10-IDEX-0002-02]
- Ministry of Science, Technology and Space, Israel
- French CNRS through a PICS-PRC grant
- Israeli MOST through a PICS-PRC grant
We demonstrate room temperature chiral coupling of valley excitons in a transition metal dichalcogenide monolayer with spin momentum locked surface plasmons. At the onset of the strong coupling regime, we measure spin-selective excitation of directional flows of polaritons. Operating under such conditions, our platform yields surprisingly robust intervalley contrasts (ca. 40%) and coherence (ca. 5-8%) as opposed to their total absence for the uncoupled valley excitons at room temperature. These results open rich possibilities, easy to implement, in the context of chiral optical networks.
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