Xiaoyuan Liu, Zhou Zhao, Shengming Xu, Jingcheng Zhang, Yin Zhou, Yulun He, Takeshi Yamaguchi, Hua Ouyang, Takuo Tanaka, Mu Ku Chen, Shengxian Shi, Fei Qi, Din Ping Tsai
Fluid flow behavior is visualized through particle image velocimetry (PIV) for understanding and studying experimental fluid dynamics. However, traditional PIV methods require multiple cameras and conventional lens systems for image acquisition to resolve multi-dimensional velocity fields. In turn, it introduces complexity to the entire system. Meta-lenses are advanced flat optical devices composed of artificial nanoantenna arrays. It can manipulate the wavefront of light with advantages of ultrathin, compact, and no spherical aberration...
December 3, 2023: Advanced Materials