Active Terahertz Surface Plasmon Polariton Multi-focal Focusing Lens based on Graphene Metasurface

Yifan Tang; Huirong Wang; Quan Li; Tai Chen

doi:10.63313/AERpc.9030

Authors

Yifan Tang School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China Author
Huirong Wang School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China Author
Quan Li School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China Author
Tai Chen School of Electronic Engineering, Tianjin University of Technology and Education, Tianjin 300222, China Author

DOI:

https://doi.org/10.63313/AERpc.9030

Keywords:

Terahertz, Surface plasmon polariton, Multi-focal focusing lens, Graphene

Abstract

Terahertz (THz) focusing lenses, as crucial components for manipulating THz wavefronts and achieving energy concentration, play a vital role in fields such as THz imaging, sensing, and communication. Therefore, in this work, we de-signed and simulated an active terahertz surface plasmon polariton (SPP) mul-ti-focal focusing lens based on graphene. The lens consists of four concentric slit resonator rings (SRRs). By integrating graphene onto each SRR and applying bias voltages, the device achieves independent "ON/OFF" control over the SPP excitation efficiency for any two selected slit resonator rings. This allows for dynamic switching at the same operating frequency to produce various distinct focal distributions. Our design not only offers a new avenue for realizing com-pact and multifunctional THz wavefront manipulation devices but also demon-strates significant potential for future applications in areas such as THz dynamic beam shaping and reconfigurable imaging.

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