Deformation-Induced Electromagnetic Reconfigurable Square Ring Kirigami Metasurfaces

Area of Science:

• Electromagnetics
• Materials Science
• Metamaterials

Background:

• Wireless communication demands adaptable electromagnetic (EM) metamaterials for complex environments.
• Current reconfigurable EM systems often face limitations in flexibility and manufacturing cost.

Purpose of the Study:

• To propose a mechanically tunable planar kirigami frequency selective surface (FSS).
• To enable active control of the FSS resonant frequency through mechanical deformation.

Main Methods:

• Designed a kirigami-structured substrate with embedded copper square-ring resonators.
• Utilized tensile deformation to alter resonator shape and position, tuning EM properties.
• Employed EM finite element simulations and transmittance measurements for validation.

Main Results:

• Demonstrated continuous adjustment of FSS resonant frequency and bandwidth via biaxial mechanical stretching.
• Achieved active tuning by modifying capacitance-inductance coupling through deformation.
• Confirmed excellent polarization and incident angle stability of the proposed FSS.

Conclusions:

• The kirigami FSS offers a flexible and cost-effective approach to active EM tuning.
• Understanding the deformation-electromagnetic coupling mechanism guides practical engineering applications.
• This work lays the groundwork for advanced tunable metamaterial devices.