首页|Broadband terahertz wavefront modulation based on flexible metasurface

Broadband terahertz wavefront modulation based on flexible metasurface

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  • NSTL
  • Elsevier
? 2021 Elsevier B.V.To broaden the range of working frequency of the metasurface in the THz band, a flexible metasurface based on the parylene-C film was proposed. The metasurface is composed of elliptical split-ring units with different opening gaps. Elliptical split-ring units with different arrangement can work as 2D beam deflector, 3D beam deflector or vortex generator. The 2D beam deflector modulate THz waves with deflection angles (38°–13.5°) in the broad frequencies (0.6–1.6 THz), whereas the 3D beam deflector can realize beam deflection in 3D space, and the vortex beam generator can modulate THz wave as stable vortex beams carrying orbital angular momentum (OAM) in the broad frequencies (0.8–1.4 THz). The simulation results illustrate that the proposed flexible metasurface exhibits broadband effect in THz range, which promotes the application of flexible metasurfaces in the fields of THz optical field modulation and THz communication.

Anomalous refractionBroadband effectFlexible metasurfacePhase gradientTHz waveVortex beam

Ren H.、Yue W.、Liu J.、Liu L.、Geng Z.

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Shandong Provincial Engineering and Technical Center of Light Manipulations School of Physics and Electronics Shandong Normal University

State Key Laboratory of Superlattices and Microstructures Institute of Semiconductors Chinese Academy of Sciences

School of Information Engineering Minzu University of China

2022

10.1016/j.optcom.2021.127840

Optics Communications

Optics Communications

EISCI
ISSN：0030-4018
年,卷(期)：2022.508
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