Yang Qi, Zhang Jicheng, Wang Xuemin, Zhan Zhiqiang, Jiang Tao, Li Jia, Zou Ruijiao, Li Keyu, Chen Fengwei, Wu Weidong
Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, CAEP, Mianyang 621900, China.
Nanomaterials (Basel). 2022 Jul 23;12(15):2529. doi: 10.3390/nano12152529.
High-power, incoherent THz array sources are widely desired in some applications due to their low energy, unique terahertz fingerprint, and image. In this work, a dual ridge terahertz quantum cascade laser lasing at 3.1 THz is presented, and the device's performance is analyzed in detail. The maximum output power can reach 512 mW when the two ridges work simultaneously in continuous-wave mode, with a threshold current density of 281 A/cm at 15 K. While the peak power is approximately 704 mW in pulse-wave mode at 15 K, the lasing still could be observed approximately 7 mW at 125 K. The far-field pattern of the dual ridge THz QCL is detected by a THz camera; two light spots typically show a single-lobe Gaussian distribution. The experimental results provide a reference for realizing high-power THz quantum cascade lasers, and they will provide some guidance for the structural design of multiple ridges or laser arrays.
高功率、非相干太赫兹阵列源因其低能量、独特的太赫兹指纹和成像特性，在某些应用中备受青睐。在这项工作中，展示了一种在3.1太赫兹频率下激射的双脊太赫兹量子级联激光器，并对该器件的性能进行了详细分析。当两个脊在连续波模式下同时工作时，最大输出功率可达512毫瓦，在15K时阈值电流密度为281安/平方厘米。而在15K的脉冲波模式下峰值功率约为704毫瓦，在125K时仍能观察到约7毫瓦的激射。双脊太赫兹量子级联激光器的远场图案由太赫兹相机检测；两个光斑通常呈现单瓣高斯分布。实验结果为实现高功率太赫兹量子级联激光器提供了参考，也将为多脊或激光阵列的结构设计提供一些指导。
Zotero 插件
