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Updated: May 23, 2026
09:25
Fabricating van der Waals Heterostructures with Precise Rotational Alignment
Published on: July 5, 2019
Integration of 2D Materials in Radial van der Waals Heterostructure Metasurfaces
Connor Heimig1, Jonas Biechteler1, Cristina Cruciano2
1Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-University, 80539 Munich, Germany.
ACS Nano
|May 21, 2026
Summary
We developed a compact metasurface using hexagonal boron-nitride (hBN) and WS2 monolayers for enhanced light-matter interactions. This novel design enables robust exciton-photon coupling and scalable generation of hybrid photonic-excitonic states.
Area of Science:
- Nanophotonics and 2D Materials Science
- Exploration of light-matter interactions in nanoscale photonic systems using advanced materials.
Background:
- Two-dimensional semiconductors like transition metal dichalcogenides (TMD) show strong room-temperature excitonic transitions.
- Nanoscale photonic systems are crucial for studying light-matter interactions.
Purpose of the Study:
- To demonstrate a compact, polarization-invariant photonic metasurface based on radial bound states in the continuum (BIC).
- To achieve enhanced photoluminescence and explore hybrid photonic-excitonic states by integrating the metasurface with a WS2 monolayer.
Main Methods:
- Fabrication of a hexagonal boron-nitride (hBN) metasurface utilizing radially distributed asymmetric resonators.
- Integration of the hBN metasurface with a WS2 monolayer.
- Analysis of photoluminescence enhancement and momentum-space patterns.
Main Results:
- Demonstration of a compact (4.5 μm footprint) hBN metasurface with high-quality (Q) factor resonances.
- Observation of enhanced photoluminescence from WS2 monolayer when aligned with metasurface resonance.
- Identification of discrete momentum-space patterns indicating orbital-angular-momentum-carrying ring eigenmodes.
Conclusions:
- The study establishes a scalable approach for creating hybrid photonic-excitonic states with structured momentum-space properties.
- The developed metasurface offers opportunities for exciton localization, valley emission, and spatially controlled light-matter interactions.
- This work paves the way for compact luminescent devices based on 2D material integrated metasurfaces.
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