External Field-Driven Adaptive Electromagnetic Wave Response Material: From Mechanisms to Applications

Area of Science:

• Materials Science
• Electromagnetics
• Nanotechnology

Background:

• Exponential growth in electronic devices and wireless communications increases electromagnetic interference (EMI).
• Traditional static electromagnetic wave shielding materials have limitations in adaptability.
• Need for advanced materials with self-adaptive electromagnetic (EM) wave shielding and absorption capabilities.

Purpose of the Study:

• To review state-of-the-art developments in tunable EM wave shielding and absorbing materials controlled by external fields.
• To systematically analyze various regulation mechanisms for EM wave response control.
• To evaluate how these materials address limitations of traditional static solutions.

Main Methods:

• Analysis of force-controlled mechanisms (compression, rotation, stretching).
• Examination of thermal-controlled mechanisms (phase transition, thermal expansion).
• Investigation of electric field-driven and subwavelength structure-based approaches.
• Review of materials like porous carbon, polymer composites, metamaterials, metasurfaces, phase-change materials, and magnetoelectric composites.

Main Results:

• Materials demonstrate switchable states between transmission, absorption, and reflection.
• Frequency-tunable properties are achieved through external field control.
• Porous carbon and polymer composites adjust EM response under deformation.
• Metamaterials and metasurfaces offer precise EM wave control via tailored resonances and reconfigurable geometries.
• Phase-change materials and magnetoelectric composites enable reversible switching between shielding, absorption, and transmission modes.

Conclusions:

• Tunable EM wave shielding and absorbing materials offer dynamic response control.
• These advanced materials overcome limitations of static solutions.
• Key challenges and opportunities exist for next-generation EM wave functional materials.