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Optimized Fabrication Procedure for High-Quality Graphene-based Moiré Superlattice Devices
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Wide-Angle Emission in Cylindrical Moiré Lattices Enabled by Rolling Origami
Min Tang1,2, Fanzhou Lv2, Haiyun Dong3,4
1School of Optoelectronics Engineering and Instrumentation Science, Dalian University of Technology, Dalian 116024, China.
Nano Letters
|April 13, 2026
Summary
Researchers developed curved moiré photonic lattices for tunable light emission. This innovation allows for wide-angle light sources on cylindrical surfaces, overcoming limitations of fixed emission directions in conventional designs.
Area of Science:
- Photonics and optical engineering
- Materials science
- Condensed matter physics
Background:
- Twisted photonic lattices forming moiré superlattices offer unique properties for light sources.
- Conventional moiré lattices face challenges in achieving broad emission angles due to fixed confined mode directions.
Purpose of the Study:
- To design and fabricate single-layer moiré photonic lattices into cylindrical geometries.
- To enable wide-angle localized-mode emission from these curved structures.
- To maintain stable single-mode operation and spectral uniformity.
Main Methods:
- Utilized a nanomembrane origami technique to create cylindrical moiré photonic lattices.
- Investigated localized flat-band modes under varying effective twist angles.
- Observed emission patterns across a wide range of azimuthal angles.
Main Results:
- Successfully fabricated single-layer moiré photonic lattices into cylindrical geometries.
- Demonstrated wide-angle localized-mode emission with stable single-mode operation.
- Achieved periodic localized-mode emission over a broad range of azimuthal angles with excellent spectral uniformity.
Conclusions:
- The developed cylindrical moiré photonic lattices enable tunable, wide-angle light emission on curved surfaces.
- This approach overcomes limitations of fixed emission angles in conventional moiré lattices.
- Potential applications include 3D imaging, light detection and ranging, and topological state manipulation.
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