【摘 要】
：
Quantum cascade lasers are (QCLs) semiconductor laser sources based on intersubband transitions in multiple quantum well systems. Their unique operation pri
【机 构】
：
Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of S
【出 处】
：
The 6th International Conference on Nanoscience and Technolo
论文部分内容阅读
Quantum cascade lasers are (QCLs) semiconductor laser sources based on intersubband transitions in multiple quantum well systems. Their unique operation principle and good performance have established themselves as the leading tunable coherent semiconductor source in the infrared and terahertz (THz) regimes. Despite eminent improvements obtained in the past years, the development of mid-infrared and THz QCLs with high power, high efficiency, high spectral performance and good beam quality is still a challenging task. Here, we report some results on design, growth, fabrication, and operation of mid-infrared and THz QCLs in the Institute of Semiconductors, Chinese Academy of Sciences. Representative mid-infrared QCLs with high power and small divergence of 2.9??0.12?, continuous-wave operation at room temperature of a 7.15 microns quantum dot cascade laser, and THz QCLs with emitting powers of > 1.37 W are demonstrated.
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