15:15 〜 15:30 [G-1-5] Novel Evaluation Technique of GaN Surfaces Using Laser-induced Terahertz Emission ○Y. Sakai1, I. Kawayama1, H. Nakanishi2, M. Tonouchi1 (1.Osaka Univ., 2.SCREEN Holdings Co., Ltd.(Japan)) https://doi.org/10.7567/SSDM.2015.G-1-5