Related Experiment Video
Updated: Jan 21, 2026

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
A dynamically reconfigurable terahertz metasurface enabled by hybrid Ge2Sb2Te5 and VO2 phase-change materials
Guan Wang1, Mingna Chu2, Jijuan Jiang1
1College of Communication and Electronic Engineering, Qiqihar University, Qiqihar 161000, PR China. 03919@qqhru.edu.cn.
None:
A multifunctional terahertz metasurface is proposed, which is designed based on temperature-controllable phase-change materials. Through the synergistic modulation of Ge2Sb2Te5 (GST225) and vanadium dioxide (VO2), the metasurface achieves linear-to-circular polarization conversion (LTC-PC), chiral response, focusing capability, and tunable broadband absorption functions. When GST225 is in the amorphous state and VO2 is in the insulating state, the metasurface achieves efficient LTC-PC. Additionally, when illuminated with circularly polarized waves, the metasurface demonstrates strong circular dichroism (CD), and the corresponding CD efficiency is analyzed. The metasurface realizes focusing capability through the combined use of the Pancharatnam-Berry (PB) phase principle and resonant effects. When the GST225 material was tuned to the crystalline state, the dynamically tunable broadband absorption was achieved by modulating the conductivity of VO2.
Related Concept Videos
Phase Transitions
Hybrid Zones
Phase Diagrams
Dynamic Equilibrium
Phase Transitions: Sublimation and Deposition
Le Chatelier's Principle: Changing Concentration

