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Updated: Jan 17, 2026
Fabrication of 1-D Photonic Crystal Cavity on a Nanofiber Using Femtosecond Laser-induced Ablation
Published on: February 25, 2017
A van der Waals Moiré Bilayer Photonic Crystal Cavity
Lesley Spencer1,2, Nathan Coste1,2, Xueqi Ni3
1School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, New South Wales 2007, Australia.
Researchers created tunable Moiré photonic crystal cavities using hexagonal boron nitride. These novel structures enable enhanced light-matter interactions for next-generation nanophotonics.
Area of Science:
- Nanophotonics
- Quantum Optics
- Materials Science
Background:
- Photonic structures are crucial for manipulating light-matter interactions in classical and quantum nanophotonics.
- Moiré twisted bilayer optical materials offer tunable platforms for nanophotonic devices.
- Realizing Moiré photonic crystal (PhC) cavities is hindered by fabrication challenges and material limitations.
Purpose of the Study:
- To develop and demonstrate Moiré bilayer PhC cavities using hexagonal boron nitride (hBN).
- To achieve controllable twist angles and flatband modes in the visible spectrum.
- To advance the development of on-chip twisted nanophotonic systems.
Main Methods:
- Utilizing the unique properties of van der Waals material hexagonal boron nitride.
- Designing and fabricating Moiré bilayer PhC cavities with controlled twist angles.
- Optical characterization to confirm cavity modes and engineered dispersion relations.
Main Results:
- Successful realization of Moiré bilayer PhC cavities using hBN.
- Demonstration of controllable twist angles and flatband modes around 450 nm.
- Confirmation of spatially periodic cavity modes linked to the flatband dispersion.
Conclusions:
- This work presents a significant advancement in fabricating Moiré photonic crystal cavities.
- The developed hBN-based Moiré cavities are promising for next-generation on-chip nanophotonic systems.
- Harnessing 2D van der Waals materials opens new avenues for tunable nanophotonic devices.
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