太赫兹科学与电子信息学报, 2016, 14 (5): 657, 网络出版: 2016-11-30
低阈值连续波工作的2.9 THz量子级联激光器
Fabrication of continuous-wave-work 2.9 THz quantum cascade laser with low threshold
摘要
为了获得低阈值连续波工作太赫兹源,采用固源分子束外延技术生长了GaAs/AlGaAs束缚态向连续态跃迁的太赫兹量子级联激光器(QCL)有源区,基于半绝缘-等离子体波导工艺制作了太赫兹量子级联激光器。获得了激光器(腔面未镀高反射膜)的发射光谱和相应的输出特性等性能,其中器件在10 K 工作温度、350 mA 激励电流下的中心频率为2.93 THz,连续波工作模式的阈值电流密度为156 A/cm2,器件的最大光输出功率为7.84 mW,最高工作温度为62 K。
Abstract
In order to obtain low threshold and continuous-wave-work THz source, a terahertz Quantum Cascade Laser(QCL) based on bound-to-continuum intersubband transition is fabricated with semiconductor-plasma waveguide. Then the QCL properties are systematically studied. The lasing frequency is determined to be 2.93 THz and the device shows a Continuous Wave(CW) output power>7.8 mW, with a threshold current density 156 A/cm2, lasing work temperature up to 62 K.
蒋涛, 湛治强, 沈昌乐, 杨宁, 邓青华, 王雪敏, 楚卫东, 吴卫东, 段素青, 唐永建. 低阈值连续波工作的2.9 THz量子级联激光器[J]. 太赫兹科学与电子信息学报, 2016, 14(5): 657. JIANG Tao, ZHAN Zhiqiang, SHEN Changle, YANG Ning, DENG Qinghua, WANG Xuemin, CHU Weidong, WU Weidong, DUAN Suqing, TANG Yongjian. Fabrication of continuous-wave-work 2.9 THz quantum cascade laser with low threshold[J]. Journal of terahertz science and electronic information technology, 2016, 14(5): 657.