[9a-C213-1~13] 3.8 Terahertz technologies

9:00 AM - 9:15 AM JST(12:00 AM - 12:15 AM UTC)

[9a-C213-1] Analysis of High-Power and Low Current Density Operation in GaAs-Based Terahertz Quantum Cascade Lasers

〇Koki Yabe^1,2, Takayuki Ishida¹, Sachie Fujikawa^2,1, Yuki Tsuda³, Keita Miyagawa³, Koichi Akiyama³, Yosuke Suzuki³, Tsung Tse Lin^4,1, Hiroyuki Yaguchi², Hideki Hirayama¹ (1.RIKEN, 2.Saitama Univ., 3.MELCO, 4.TOhoku Univ.)

Keywords:

Quantum Cascade Laser,NEGF,Terahertz

To achieve high-power operation of terahertz quantum cascade lasers (THz-QCLs), the effects of quantum structure design and doping position in highly doped GaAs-based THz-QCLs were investigated using nonequilibrium Green's function simulations. Optimization of the layer thicknesses and doping position was found to improve the optical gain. Furthermore, adjustment of the barrier thickness demonstrated the potential for reducing the current density while maintaining high optical gain.