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Updated: Feb 13, 2026
11:10
Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model
Published on: May 23, 2018
12.5K
Tunable Chiral Terahertz Wave Absorption and Beam Manipulation Based on Vanadium Dioxide Metasurfaces.
Li Luo1,2, Boyu Chen1,2, Jie Li1,2
1Sichuan Province Key Laboratory of Optoelectronic Sensor Devices and Systems, College of Optoelectronic Engineering (Chengdu IC Valley Industrial College), Chengdu University of Information Technology, Chengdu 610225, China.
Nanomaterials (Basel, Switzerland)
|February 12, 2026
Summary
This study introduces a chiral metasurface using vanadium dioxide (VO2) for dynamic terahertz control. It demonstrates tunable circular dichroism and chirality-dependent phase modulation for advanced optical applications.
Area of Science:
- Metasurfaces
- Terahertz optics
- Chirality
Background:
- Chiral metasurfaces offer significant potential for optical applications.
- Vanadium dioxide (VO2) is a phase-change material enabling dynamic regulation.
- Integrating VO2 with chiral metasurfaces provides a novel pathway for advanced optical control.
Purpose of the Study:
- To design and investigate a chiral absorptive metasurface based on VO2.
- To demonstrate dynamic tuning of circular dichroism (CD) and phase modulation in the terahertz band.
- To achieve simultaneous absorptive CD tuning and reflective beam shaping for enhanced polarization control.
Main Methods:
- Design of a chiral absorptive metasurface incorporating VO2.
- Tuning VO2 conductivity around 2.81 THz to adjust circular dichroism.
- Introduction of Pancharatnam-Berry (PB) phase for chirality-dependent phase gradients.
Main Results:
- Achieved continuous adjustment of circular dichroism from 0.06 to 0.95, realizing a high-contrast chiral switch.
- Demonstrated controllable deflection of reflected beams for left-handed circularly polarized (LCP) waves via phase modulation.
- Enabled selective absorption of right-handed circularly polarized (RCP) waves at specific VO2 conductivity.
Conclusions:
- The proposed
- chiral phase encoding
- strategy enables simultaneous absorptive CD tuning and reflective beam shaping.
- The metasurface offers enhanced flexible manipulation of circular polarization states in the terahertz band.
- Provides a compact and efficient solution for reconfigurable imaging, unidirectional communication, and integrated photonics.
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