Work

Design of High-Efficiency Circularly Polarized Reflection Mirror Based on Chiral Dielectric Metasurface

Year: 2025

Type: article

Abstract: Circularly polarized lasers can directly generate circularly polarized light without requiring complex external optics, enabling applications in biosensing, environmentally friendly antibacterial treatments, and cancer cell phototherapy. However, the circular dichroism (CD) of chiral metasurface mirrors—a core component of such lasers—typically remains below 3%, limiting beam quality. Using COMSOL simulations, we broke the metasurface’s structural symmetry via displacement and rotation operations, introducing chirality to the unit cell. At 980 nm, the metasurface achieved 99.85% reflectivity and 52% CD. Multipole analysis suggests this enhancement stems from electric dipole and quadrupole coupling. Our laser design could generate micro-nano-scale chiral light, advancing applications in biophotonics, biomedicine, and life sciences.

Source: Photonics

DOI: 10.3390/photonics12040341

Authors: Bo Cheng, Yuxiao Zou, Kunpeng Zhai, Guofeng Song

Institutions: Chengdu Polytechnic, Kunming Institute of Physics, Nankai University, Chinese Academy of Sciences, Institute of Semiconductors

Language: English

Topic: Metamaterials and Metasurfaces Applications

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: Chinese Academy of Sciences, Nankai University, University of Chinese Academy of Sciences