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Electrically tunable metasurface based on Mie-type dielectric resonators
Zhaoxian Su1, Qian Zhao2, Kun Song1
1Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi'an, 710129, China.
Scientific Reports
|February 22, 2017
Summary
This study introduces an electrically tunable metasurface using Mie-type resonators. This novel design allows for dynamic control over electromagnetic wave reflection, paving the way for advanced optical devices.
Area of Science:
- Metamaterials and Nanophotonics
- Electromagnetics and Wave Phenomena
Background:
- Metasurfaces offer unique control over electromagnetic waves.
- Tunable metasurfaces are crucial for adaptive optical systems.
Purpose of the Study:
- To design and theoretically demonstrate an electrically tunable metasurface.
- To achieve dynamic control over the reflection phase of electromagnetic waves.
Main Methods:
- Utilized disk-like ferroelectric resonators on a metal film.
- Employed an ion gel film for electrical tunability of resonator permittivity.
- Applied an external electric field to adjust resonator properties.
Main Results:
- Demonstrated dynamic adjustment of reflection phase over a wide range.
- Achieved a 2π phase ramp by programmable electric field control.
- Obtained arbitrary reflection behavior for incident waves of varied frequencies.
Conclusions:
- The designed metasurface exhibits significant tunability for electromagnetic wave manipulation.
- This technology can be applied to create adaptive metasurface lenses and carpet cloaks.
