Fabrication and characterization of photonic crystal-based symmetric Mach-Zehnder (PC-SMZ) structures based on GaAs membrane slab waveguides. - Yoshimasa Sugimoto; Yu Tanaka; Naoki Ikeda; Hitoshi Nakamura; Kyozo Kanamoto; Shunsuke Ohkouchi; Yoshinori Watanabe; Kuon Inoue; Kiyoshi Asakawa (IEEE J. Sel. Areas Commun., 2005)