Terahertz Quantum Cascade Laser Operating at 2.94 THz

• 作者: 刘俊岐 刘峰奇 李路 王利军 王占国 陈剑燕
• 来源期刊: 中国物理快报(英文版)
• 学科: 工学
• 关键词: 量子级联激光器 太赫兹 等离子体波导 阈值电流密度 特征温度 绝缘表面 量子效率 光功率
• 年，卷（期）: 2010,（10）
• 页码范围: 107-109
• 页数: 3页
• 分类号: TN248 O451
• 语种: 英文

摘要

The development of quantum cascade laser at 2.94 THz is reported. The laser structure is based on a bound-to-continuum active region and a semi-insulating surface-plasmon waveguide. Lasing is observed up to a heat-sink temperature of 70 K in pulsed mode with light power of 4.75 mW at 10 K and 1 mW at 70 K. A threshold current density of 296.5 A/cm2 and an internal quantum efficiency of 1.57 * 10-2 per cascade period are also observed at 10 K. The characteristic temperature of this laser is extracted to be T0 = 57.5 K.