The quantum cascade laser has liberated laser properties from materials limitations, enabling light emission to be tailored over a broad spectral range. Nature Materials talks to Federico Capasso about the development of these lasers in his laboratory.
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Heber, J. The staircase to flexibility. Nature Mater 9, 374–375 (2010). https://doi.org/10.1038/nmat2758
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DOI: https://doi.org/10.1038/nmat2758
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