Qunatum Cascade Laser
Qunatum Cascade Laser
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A quantum cascade laser (QCL) is a semiconductor device that emits light in the mid-infrared region of the electromagnetic spectrum. It is composed of multiple layers of semiconductor materials, with tunnel junctions that allow electrons to "cascade" from one energy level to the next. This process produces light at specific wavelengths that can be used for various applications, such as sensing, spectroscopy, communications, and other opto-electronic applications.