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説明:

A fundamental requirement for photonic technologies is the ability to control the confinement and propagation of light. Widely utilized platforms include two-dimensional (2D) optical microcavities in which electromagnetic waves are confined between either metallic or multi-layer dielectric distributed Bragg reflectors. However, the fabrication complexities of thick Bragg reflectors and high losses in metallic mirrors have motivated the quest for efficient and compact mirrors. Recently, 2D transition metal dichalcogenides hosting tightly bound excitons with high optical quality have emerged as promising atomically thin mirrors. In this work, we propose and experimentally demonstrate a sub- wavelength 2D nano-cavity using two atomically thin mirrors with degenerate resonances. Angle- resolved measurements show a flat dispersion of the optical mode, which sets this system apart from conventional photonic cavities. Remarkably, we demonstrate how the excitonic nature of the mirrors enables the formation of chiral and tunable optical modes upon the application of an external magnetic field. Moreover, we show the tunability of the confined mode via electrical contacts, pump intensity, and temperature. Our work establishes a new regime for engineering intrinsically chiral sub-wavelength optical cavities and opens avenues for realizing spin-photon interfaces and exploring chiral many-body cavity electrodynamics.

権利情報:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

キーワード: Photonic technologies, optical microcavities, excitonic materials

刊行年月日: 2024-12-20

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

掲載誌:

• Science Advances (ISSN: 23752548) vol. 10 issue. 51

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.adr5904

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更新時刻: 2025-02-05 12:31:14 +0900

MDRでの公開時刻: 2025-02-05 12:31:14 +0900