Fig. 1: The demonstration of the tunable chiral metamaterials based on GST225.
From: Nonvolatile chirality switching in terahertz chalcogenide metasurfaces
a Scheme of the chirality switching bilayer metamaterials based on GST225 strips. Inset: the meta-atom consisted of two different shaped resonators patterned on each side of the PI board. b Photos of the 2×2 resonator section of the fabricated metamaterials before crystallization (left column) and after crystallization (right column). Scale bar: 200 μm. The measured transmission c magnitude and d phase spectra of LCP (blue lines) and RCP (red lines) incident waves, with amorphous (solid lines) and crystalline (dashed lines) states. The simulated transmission e amplitude and f phase spectra of LCP (blue lines) and RCP (red lines) incident waves, with amorphous (solid lines) and crystalline (dashed lines) states
