Abstract
In this paer, a continuous-wave surface-emitting photonic crystal THz quantum cascade laser (QCL) with a monochromatic and low divergence output beam was demonstrated. Researchers at the University Paris Sud in France in collaboration with Cambridge University in the UK combined their recently designed efficient photonic crystal resonator with a low-threshold quantum cascade material to produce an optimised 2.7 THz QCL which could be used for heterodyne detection applications such as in astronomy.
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