Dispersion-free characterization of terahertz slab–waveguide modal confinement based on a metal Bragg grating structure oleh Borwen You, Che-Chu Hsieh, Ryuji Iwasa, Hung-Yi Tsai, Yen-Shan Lin, Liang-Cheng Yu, Pin-Jung Lu, Shiun-Yun Chang, Yuan-Chi Wu