4:55 PM - 4:56 PM [PS-5-08] Evaluation of Propagation Losses in Corrugation-Reduced GaAs/AlGaAs periodically-inverted Waveguides ○S. Wang1, T. Matsushita1, T. Matsumoto1, S. Yoshida1, T. Kondo1 (1.Univ. of Tokyo (Japan))