Download file (944 KB)
Download as zip (858 KB)

Collection

Citation

Description:

Transition metal dichalcogenides (TMDCs) are at the forefront of nanophotonics because of their exceptional optical characteristics. The 2D architecture of TMDCsfacilitates efficient light absorption and emission, holding tantalizing potential for next-generation nanophotonic and quantum devices. Yet, the atomic thinness limits their interaction volume with light, affecting light-matter interaction and quantum efficiency. The light coupling in the 2D layeredTMDCs can be enhanced by integration with photonic structure, and the metasurfaces supporting bound states in the continuum (BICs) offer strong confinement of optical fields, ideal for coupling with 2D TMDCs. Here, we demonstrate enhanced light-matter coupling by integrating TMDC mono-layers, including WSe2 and MoS2, with a finite-area membrane metasurface, leading to amplified and high-quality-factor (Q-factor) spontaneous emission from quasi-BIC-coupled TMDC monolayers. The high-Q-factor emission extends over an area with a scale of a few micrometers while maintaining the high-Q factor across the emission area. Notably, the suspended finite-area membrane metasurface, which is freestanding in air rather than positioned atop a substrate, minimizes radiation loss while enhancing light-matter interaction in the TMDC monolayer. Furthermore, the predominantly in-plane dipole orientation of excitons within TMDC monolayers results in distinctive enhancement behaviors for emission, contingent on the excitation power, when coupled with quasi-BIC modes exhibiting TE and TM resonances. This work introduces a nanophotonic platform for robust coupling of membrane metasurfaces with 2D materials, offering possibilities for developing 2D material-based nanophotonic and quantum devices.

Rights:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Nano, copyright © 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsnano.4c05560

Keyword: suspended metasurface, membranes, BIC, light-matter coupling, TMDC monolayers, WSe2, MoS2

Date published: 2024-09-03

Publisher: American Chemical Society (ACS)

Journal:

• ACS Nano (ISSN: 19360851) vol. 18 issue. 35 p. 24173-24181

Funding:

• NIMS
• Center of Atomic Initiative for New Materials, National Taiwan University 108L9008
• JSPS JP21H04660
• JSPS JP22K14623
• JSPS JP23H00253
• JSPS JP23H00262
• JSPS JP23H01461
• JSPS JP23K26155
• JSPS JP24K17627
• Ministry of Education, Culture, Sports, Science and Technology
• NSTC, Taiwan 112-2124-M-002-010
• Ministry of Education, Taiwan 108L9008

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4763

First published URL: https://doi.org/10.1021/acsnano.4c05560

Related item:

Other identifier(s):

Contact agent:

Updated at: 2025-08-21 08:30:32 +0900

Published on MDR: 2025-08-21 08:19:12 +0900