[19p-225B-1~15] 3.11 Photonic structures and phenomena

[19p-225B-12] Suppression and revival of oscillation of electrically pumped photonic crystal nanolasers by PT phase transition

〇Kenta Takata^1,2, Kengo Nozaki^1,2, Eiichi Kuramochi^1,2, Shinji Matsuo^1,3, Koji Takeda^1,3, Takuro Fujii^1,3, Shota Kita^1,2, Akihiko Shinya^1,2, Masaya Notomi^1,2 (1.NTT Nanophotonics Center, 2.NTT Basic Research Labs., 3.NTT Device Technology Labs.)

Keywords:PT symmetry, photonic crystal laser, exceptional point

We previously proposed a parity-time (PT-) symmetric coupled resonator array based on buried-heterostructure photonic crystal lasers, as a PT-symmetric optical platform with potential fine controllability and scalability. Here, we experimentally report a system of two coupled photonic crystal lasers, which shows loss-induced suppression and revival of oscillation in its emission spectrum, under controlled electric pumping via current injection for each nanocavity.