Low-Frequency Terahertz Photonic Crystal Waveguide with a Lilac-Shaped Defect Based on Stereolithography 3D Printing. - Shi, Jia; Ding, Yiyun; Tang, Longhuang; Li, Xiuyan; Bai, Hua; Li, Xianguo; Fan, Wei; Niu, Pingjuan; Fu, Weiling; Yang, Xiang; Yao, Jianquan (Applied Sciences (2076-3417), 2022)