Robust waveguiding in substrate-integrated topological photonic crystals
Qiaolu Chen, Li Zhang, Su Xu, Zuojia Wang, Er‐Ping Li, Yihao Yang, Hongsheng Chen
Abstract
Recent development of topological photonics has enabled photonic energy flow robust against disorders. On the other hand, waveguiding in substrate-integrated planar platforms is significant for microwave and mm-wave technology. Here, we propose substrate-integrated topological photonic crystals (PhCs) that support robust pseudospin-dependent edge states. We verify the robustness of pseudospin-dependent electromagnetic-wave (EM-wave) energy transport through sharply twisted corners, random defects, or a channel intersection both numerically and experimentally at microwave frequencies. The present topological PhCs with planar forms, small thicknesses, and excellent electrical shielding pave the way toward manipulation of EM topological pseudospins in an integrated platform.