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Laser induced shift of atomic states due to the AC-Stark effect has played a central role in cold-atom physics and facilitated their emergence as analog quantum simulators. Here, we explore this phenomena in an atomically thin layer of semiconductor MoSe₂, which we embedded in a heterostructure enabling charge tunability. Shining an intense pump laser with a small detuning from the material resonances, we generate a large population of virtual collective excitations, and achieve a regime where interactions with this background population is the leading contribution to the AC-Stark shift. Using this technique we study how itinerant charges modify – and dramatically enhance – the interactions between optical excitations. In particular, our experiments show that the interaction between attractive polarons could be more than an order of magnitude stronger than those between bare excitons.

権利情報:

• In Copyright
  

  © 2024 American Physical Society

キーワード: AC-Stark effect, MoSe2 semiconductor, Attractive polarons

刊行年月日: 2024-01-29

出版者: American Physical Society (APS)

掲載誌:

• Physical Review Letters (ISSN: 10797114) vol. 132 issue. 5 056901

研究助成金:

• Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung 200020_207520

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1103/physrevlett.132.056901

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更新時刻: 2025-08-28 16:30:20 +0900

MDRでの公開時刻: 2025-08-28 16:19:50 +0900