All-optical controlled-NOT logic gate achieving directional asymmetric transmission based on metasurface doublet

• DOI: 10.29026/oea.2023.220073
• Publication Date: 2023-01-18T08:10:27Z
• Authors: Yijia Huang; ; Tianxiao Xiao; Shuai Chen; Zhengwei Xie; Jie Zheng; Jianqi Zhu; Yarong Su; Weidong Chen; Ke Liu; Mingjun Tang; Peter Müller-Busc...; Ling Li
• Keywords: Robustness; Proof of concept; Optical computing

Optical logic gates play important roles in all-optical circuits, which lie at the heart of next-generation optical computing technology. However, intrinsic contradiction between compactness and robustness hinders development this field. Here, we propose a simple design principle that can possess multiple-input-output states according to incident circular polarization direction based on metasurface doublet, enables controlled-NOT infrared region. Therefore, directional asymmetric electromagnetic transmission be achieved. As proof concept, spin-dependent Janus is designed experimentally verified four distinct images corresponding input captured far-field. In addition, since method derived from geometric optics, it easily applied other spectra. We believe proposed doublet may empower many potential applications chiral imaging, chiroptical spectroscopy computing.