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Reconfigurable metamaterials for terahertz wave manipulation
Mohammed R Hashemi1, Semih Cakmakyapan1, Mona Jarrahi1
1University of California, Los Angeles, 420 Westwood Plaza, Los Angeles CA, 90095, United States of America.
Summary
Reconfigurable metamaterials offer advanced control over terahertz waves, overcoming natural material limitations. This review details their mechanisms, materials, and performance trade-offs for spectral and spatial manipulation.
Area of Science:
- Metamaterials Science
- Terahertz (THz) Photonics
- Optoelectronics
Background:
- Natural materials have inherent limitations in manipulating terahertz (THz) waves.
- Metamaterials offer a tunable platform for THz wave control.
- Reconfigurable metamaterials enable dynamic manipulation of THz wave properties.
Purpose of the Study:
- To provide a comprehensive overview of reconfigurable metamaterials for THz wave manipulation.
- To discuss various reconfiguration mechanisms and material platforms.
- To analyze the advantages and disadvantages of different designs.
Main Methods:
- Review of diverse reconfigurable metamaterial types.
- Analysis of reconfiguration stimuli: optical, electrical, thermal, and mechanical.
- Examination of material systems: semiconductors, superconductors, phase-change materials, graphene, and electromechanical structures.
Main Results:
- Demonstration of THz wave manipulation in intensity, phase, polarization, and propagation direction.
- Identification of key performance metrics: modulation efficiency, bandwidth, speed, and system complexity.
- Detailed comparison of different reconfigurable metamaterial approaches.
Conclusions:
- Reconfigurable metamaterials are crucial for advanced THz applications.
- The choice of reconfiguration mechanism and material impacts performance.
- Further research is needed to optimize designs for specific THz applications.
