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Tunable bilayer dielectric metasurface via stacking magnetic mirrors
Optics Express
|October 13, 2022
Summary
We developed a tunable bilayer metasurface with dual magnetic mirrors. This novel design allows for reversible switching between high reflection and high transmission, offering robust performance for optical switches.
Area of Science:
- Metasurface optics
- Dielectric nanophotonics
Background:
- Metasurfaces require tunable functionality, environmental adaptability, and simple fabrication.
- Dielectric magnetic mirrors offer potential for novel optical functionalities.
Purpose of the Study:
- To design and demonstrate a tunable bilayer metasurface.
- To achieve reversible switching between high reflection and high transmission states.
Main Methods:
- Fabrication of a bilayer metasurface using two stacked identical dielectric magnetic mirrors.
- Excitation of magnetic mirrors via multipole interference and lattice resonance.
- Manipulation of interlayer coupling by controlling interlayer spacing.
Main Results:
- Demonstrated reversible conversion between high reflection and high transmission.
- Observed magnetic mirror effect boosting interlayer coupling at small spacings.
- Achieved robust high transmission insensitive to positional perturbations.
Conclusions:
- The bilayer metasurface offers a straightforward method for tunable optical devices.
- This work provides a new pathway for high-performance optical switches in communication and sensing.
