2:30 PM - 2:45 PM ▲ [19p-A402-5] Simulation of optical gain for GaN terahertz quantum cascade lasers by usingnon-equilibrium Green’s function method 〇KE WANG1, Tsung-Tse Lin1, Li Wang1, Joosun Yun1, Hideki Hirayama1 (1.RIKEN)