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Applied physics

A cascade laser's random walk

A random array of holes etched in a semiconductor structure, consisting of a periodic series of thin layers, has been demonstrated that emits mid-infrared laser radiation. The device could have sensing and imaging applications.

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Figure 1: An electrically pumped mid-infrared random laser.

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Correspondence to Hui Cao.

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Cao, H., Sheehan, S. A cascade laser's random walk. Nature 503, 200–201 (2013). https://doi.org/10.1038/503200a

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