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説明:

Two-dimensional (2D) van der Waals layered materials are often integrated with photonic crystal (PhC) nanocavity to enhance light-matter coupling. However, the transfer of 2D materials onto PhC nanocavities often degrades the cavity quality (Q) factor. Instead of using prefabricated PhC nanocavities, we demon- strate a novel approach to form a hybrid nanocavity by placing a suitably-sized 2D material flake on a PhC waveguide. We successfully fabricated such hybrid nanocavity devices with hBN, WSe2 and MoTe2 flakes on silicon PhC waveguides, obtaining Q factors as high as 4.0×105. Remarkably, even mono- and few- layer flakes can provide sufficient local refractive index modulation to induce nanocavity formation. Since the 2D material is self-aligned to the nanocavity, we have also managed to observe cavity PL enhancement in a MoTe2 hybrid cavity device, with a cavity Purcell enhancement factor of ∼15. Our results highlights the prospect of using such 2D materials-induced PhC nanocavity to realize a wide range of photonic com- ponents for hybrid devices and integrated photonic circuits.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: 2D materials, hybrid photonics, nanocavities

刊行年月日: 2024-06-19

出版者: American Chemical Society (ACS)

掲載誌:

• ACS Photonics (ISSN: 23304022) vol. 11 issue. 6 p. 2247-2254

研究助成金:

• Japan Society for the Promotion of Science JP23H02052
• Ministry of Education, Culture, Sports, Science and Technology JPMXP1222UT1138
• RIKEN
• Japan Society for the Promotion of Science JP20H02558
• Japan Society for the Promotion of Science JP20J00817
• Japan Society for the Promotion of Science JP21H05233
• Japan Society for the Promotion of Science JP22F22350
• 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/acsphotonics.3c01927

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更新時刻: 2025-02-14 12:31:17 +0900

MDRでの公開時刻: 2025-02-14 12:31:18 +0900