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説明:

Excitons -bound electron-hole pairs- play a central role in light-matter interaction phenomena, and are crucial for wide-ranging applications from light harvesting and generation to quantum information processing. A long-standing challenge in solid-state optics has been to achieve precise and scalable control over the quantum mechanical state of excitons in semiconductor heterostructures. Here, we demonstrate a technique for creating tailored and tunable potential landscapes for optically active excitons in 2D semiconductors that enables in-situ wavefunction shaping at length scales below 10nm. Using nanostructured gate electrodes, we create localized electrostatic traps for excitons in diverse geometries such as quantum dots and rings, and arrays thereof. We show independent spectral tuning of multiple spatially separated quantum dots, which allows us to bring them to degeneracy despite material disorder. Owing to the strong light-matter coupling of excitons in 2D semiconductors, we observe unambiguous signatures of confined exciton wavefunctions in optical reflection and photoluminescence measurements. Our work introduces a new approach to engineering exciton dynamics and interactions at the nanometer scale, with implications for novel optoelectronic devices, topological photonics, and many-body quantum nonlinear optics.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: exciton wave function
, 2D semiconductors, quantum control


刊行年月日: 2024-03-22

出版者: American Association for the Advancement of Science (AAAS)

掲載誌:

• Science Advances (ISSN: 23752548) vol. 10 issue. 12 eadk6369

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1126/sciadv.adk6369

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更新時刻: 2026-02-16 16:30:10 +0900

MDRでの公開時刻: 2026-02-16 13:57:30 +0900