Nanoimprint Meta-Device for Chiral Imaging

作者：Zhang, Jing Cheng; Chen, Mu Ku; Liang, Yao; Hong, Xiao; Wang, Muting; Cheng, Yijun; Liu, Xiaoyuan; Tsai, Din Ping^*; Pang, Stella W.^*

来源：Advanced Functional Materials, 2023, 33(49).

DOI：10.1002/adfm.202306422

• chiral imaging
• chiral meta-devices
• chirality control
• circular dichroism
• nanoimprint meta-devices

The polarization of light is a valuable information channel that has been studied extensively in optical devices. There has been limited progress in developing low-refractive index contrast and large-scale chiral meta-devices that are easy to integrate and mass-produce. In this image, a chiral imaging meta-device with a large area and broadband chirality control is experimentally demonstrated. The centimeter-scale Moire meta-device is achieved using nanoimprint technology. The Poynting vector and singularity features in the near field and chiral optical response in the far field are discussed. The proposed Moire meta-devices can achieve circular dichroism (CD) of more than 10%. Further chiral imaging harnessing CD mechanisms are demonstrated, which may lead to significant potential in various fields, including encryption and security, materials science, biochemistry, and medicine.