“In the field of metasurface technology, a breakthrough has been made. Researchers have developed a single-layer chiral metasurface that exhibits strong circular dichroism, capable of converting circularly polarized light into linearly polarized light with high polarization extinction ratio. The operating wavelength is tunable by adjusting geometric parameters, and the metasurface's localized surface plasmon resonances ensure strong chiral optical effects. This research opens up a new direction for the development of high-performance circular polarizers.”