Continuous-Wave Operation of Terahertz Quantum Cascade Lasers at 3.2 THz

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（6）
• 页码范围: 102-105
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/6/064201

摘要

We demonstrate continuous-wave (cw) operation of terahertz (THz) quantum cascade lasers emitting at 3.2 THz based on bound-to-continuum active region and semi-insulating surface-plasmon waveguide design.Optical power of 62 m W with a threshold current density of 285 A/cm2 is obtained at 10 K from a 130-μm-wide and 1.5-mm-long laser in cw operation.Maximum cw operation temperature is up to 60K.In pulsed mode,peak optical power more than 100mW at 10 K and 2.1 mW at 85K are observed from a 230-μm-wide and 2-mm-long device.