α-MoO₃ Chiral Metasurface

Tunable THz circular dichroism

Achieves high circular dichroism in the terahertz range through geometric and spatial modulation, offering a new platform for chiral photonic devices.

Wang, Mingjun · Wu, Biyuan

Physical Chemistry Chemical Physics 2025

Specifications

Circular dichroism

{'zh': '0.92', 'en': '0.92'}

Advantages

Strong chiral response

By breaking in-plane symmetry with rotated rectangular units, selective absorption of RCP and LCP light is achieved.

High tunability

The CD response can be systematically tuned by period, thickness, and rotation angle, with a clear structure-property correlation.

Design flexibility

Structural variants such as elliptical unit arrays and hole-based designs enable varied CD modulation.

Applications

• Chiral photonic devices：Provides strong chiral response for direct integration into THz optical paths.
• Polarization control devices：Enables selective absorption of RCP and LCP light for polarization control.