11:15 AM - 11:30 AM [20a-S622-8] Two-Photon Fluorescence Microscopy of 1.55 μm Femtosecond Laser Excited Surface Plasmon Polaritons 〇Ryosuke Murakami1, Michio Ikezawa1, Atsushi Kubo1 (1.Univ. of Tsukuba)