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説明:

Optical nonlinear processes are indispensable in a wide range of applications, including ultrafast lasers, microscopy, and quantum information technologies. Among the diverse nonlinear processes, second-order effects usually overwhelm the higher-order ones, except in centrosymmetric systems, where the second-order susceptibility vanishes to allow the use of the third-order nonlinearity. Here we demonstrate a hybrid photonic platform whereby the balance between second- and third-order susceptibilities can be tuned flexibly. By decorating ultra-high-Q silica microcavities with atomically thin tungsten diselenide, we observe cavity-enhanced second-harmonic generation and sum-frequency generation with continuous-wave excitation at a power level of only a few hundred microwatts. We show that the coexistence of second- and third-order nonlinearities in a single device can be achieved by carefully choosing the size and location of the two-dimensional material. Our approach can be generalized to other types of cavities, unlocking the potential of hybrid systems with controlled nonlinear susceptibilities for novel applications.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: two-dimensional materials, ultra-high-Q microcavities, second-harmonic generation, nonlinear optics, transition metal dichalcogenides

刊行年月日: 2024-04-10

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 24 issue. 14 p. 4209-4216

研究助成金:

• RIKEN
• Japan Society for the Promotion of Science JP22H01893
• Japan Society for the Promotion of Science JP22K14623
• Japan Society for the Promotion of Science JP22K14624
• Japan Society for the Promotion of Science JP22K14625
• Japan Society for the Promotion of Science JP23H00262

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.4c00273

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更新時刻: 2024-08-22 08:30:13 +0900

MDRでの公開時刻: 2024-08-22 08:30:14 +0900