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Integration of 2D materials in radial van der Waals heterostructure metasurfaces
Citation Link: https://doi.org/10.15480/882.17269
Publikationstyp
Journal Article
Date Issued
2026-05-21
Sprache
English
TORE-DOI
Journal
Volume
20
Issue
22
Start Page
15927
End Page
15936
Citation
ACS nano 20 (22): 15927-15936 (2026)
Publisher DOI
Scopus ID
Publisher
American Chemical Society (ACS)
Peer Reviewed
true
Two-dimensional semiconductors, such as monolayer transition metal dichalcogenides (TMD), exhibit strong excitonic transitions at room temperature and offer a platform for exploring light-matter interactions in nanoscale photonic systems. In this work, we demonstrate a compact and polarization-invariant photonic metasurface, fabricated from hexagonal boron-nitride (hBN) and based on radial bound states in the continuum (BIC), which are formed by radially distributed pairs of structurally asymmetric resonators. The metasurface employs multiple symmetry-breaking perturbations to support high-quality (Q) factor resonances within a radial footprint of 4.5 μm – approximately one-sixth of the area of previous hBN BIC metasurface implementations based on large periodic arrays. Compared to these approaches, the radial geometry furthermore achieves sizable Q-factors with a reduced footprint. By integrating the hBN photonic structure with a WS2 monolayer, we observe enhanced photoluminescence when its resonance is spectrally aligned with the exciton resonance, accompanied by signatures of discrete momentum-space patterns that identify the orbital-angular-momentum-carrying ring eigenmodes. These features persist over a wide range of excitation powers and show minimal linewidth broadening, indicating robust and spatially modulated exciton-photon coupling. This work establishes a scalable approach for generating hybrid photonic-excitonic states with momentum-space structure, offering opportunities for exciton localization, valley emission, spatially programmable light-matter interaction in 2D material platforms and compact luminescent devices based on 2D material integrated metasurfaces.
DDC Class
539: Matter; Molecular Physics; Atomic and Nuclear physics; Radiation; Quantum Physics
620.5: Nanotechnology
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