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Quantum Cascade Lasers

Breaking energy bands

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By applying an extremely large magnetic field to break a semiconductor's energy bands into discrete levels, researchers have shown that it is possible for terahertz quantum cascade lasers to operate at unprecedented temperatures and wavelengths.

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Figure 1: The effect of a magnetic field on the energy band structure of a two-dimensional semiconductor.

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Authors and Affiliations

  1. Carlo Sirtori is at the Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot-Paris 7, Bâtiment Condorcet, Case courrier 7021, F-75205 Paris, France. carlo.sirtori@univ-paris-diderot.fr,

    Carlo Sirtori

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  1. Carlo Sirtori
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Sirtori, C. Breaking energy bands. Nature Photon 3, 13–15 (2009). https://doi.org/10.1038/nphoton.2008.262

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  • DOI: https://doi.org/10.1038/nphoton.2008.262

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