Mechanically robust waveguide-integration and beam shaping of terahertz quantum cascade lasers
Mechanically robust waveguide-integration and beam shaping of terahertz quantum cascade lasers
复制标题
机械稳健的波导集成和太赫兹量子级联激光器的光束整形
DOI：
10.1049/el.2015.1137
复制
发表时间：
2015
影响因子：
1.1
通讯作者：
Valavanis A
中科院分区：
文献类型：
--
作者：
Valavanis A
太赫兹频率量子级联激光器（THz QCL）作为1-5 THz辐射源在空间科学，生物医学和工业传感场景中具有许多潜在的应用。然而，在实验室环境之外大规模采用QCL的主要障碍包括其差的远场光束质量以及缺乏机械鲁棒性方案，这些方案允许QCL与THz波导，混频器和其他系统组件集成。提出了一种块集成方案，其中连续波3.4 THz双金属QCL被键合到铜散热块内的精密加工矩形波导中。这种高度可重复的方法提供了一个单瓣远场光束轮廓，发散度为20°，并且在阈值电流或工作温度范围内没有显著退化。
Terahertz‐frequency quantum cascade lasers (THz QCLs) have numerous potential applications as 1–5 THz radiation sources in space science, biomedical and industrial sensing scenarios. However, the key obstacles to their wide‐scale adoption outside laboratory environments have included their poor far‐field beam quality and the lack of mechanically robust schemes that allow integration of QCLs with THz waveguides, mixers and other system components. A block integration scheme is presented, in which a continuous‐wave ∼3.4 THz double‐metal QCL is bonded into a precision‐machined rectangular waveguide within a copper heat‐sink block. This highly reproducible approach provides a single‐lobed far‐field beam profile with a divergence of ≲20°, and with no significant degradation in threshold current or in the range of operating temperatures.
影响因子：
3.8
作者：
Hübers, HW;Pavlov, SG;Linfield, EH
通讯作者：
Linfield, EH