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QUANTUM CASCADE LASERS

Terahertz race heats up

The journey to realize a terahertz quantum cascade laser that operates at room temperature has taken a jump forward with news of a device that operates at –23 °C, within the reach of Peltier coolers.

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Fig. 1: Band diagram with energy levels and schematic of the electron flows across the potential.

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Correspondence to Carlo Sirtori.

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Sirtori, C. Terahertz race heats up. Nat. Photonics 15, 1–2 (2021). https://doi.org/10.1038/s41566-020-00740-4

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