Design Broadband Circular Dichroism Filter Regulated by Stacked C-Shaped Plasmon Chiral Metamaterial

Chiral metamaterials have attracted significant attention due to their unique optical properties, such as strong circular dichroism (CD) signals, which arise from the interaction between circularly polarized light and chiral structures. In this paper, we provide a three-dimensional chiral metamaterial platform with a stacked C-shaped unit cell for plasmonic excitation-based enhancement and tuning of the CD signals. Numerically, simulations of chiral metamaterials show that the strong CD response is displayed in the infrared light spectrum, where the greatest CD value is 85