VO₂-enabled transmission-reflection switchable coding terahertz metamaterials

Area of Science:

• Metamaterials Science
• Terahertz Technology
• Electromagnetics

Background:

• Coding metamaterials offer advanced control over electromagnetic waves.
• Dynamic control in the terahertz range remains a significant challenge.

Purpose of the Study:

• To propose and demonstrate a novel VO2-enabled dynamic coding terahertz metamaterial.
• To achieve switchable transmission-reflection functionalities for electromagnetic wave manipulation.

Main Methods:

• Fabrication of multilayered gold and VO2 patterns.
• Utilizing the insulator-to-metal transition of VO2 for switching.
• Construction of a coding metasurface for OAM generation.

Main Results:

• Demonstrated transmission-reflection switchable coding terahertz metamaterials.
• Achieved dynamic switching of refractive and reflective scattering beams via temperature control.
• Successfully constructed a 2-bit coding metasurface for OAM generation (l=1).
• Confirmed transmission-reflection switching functionality across different frequencies.

Conclusions:

• The proposed VO2-enabled metamaterial provides dynamic control over EM waves in the THz regime.
• This design offers a new method for real-time switching of transmission-reflection responses.
• The technology has potential applications in advanced terahertz devices and systems.