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InAs-based quantum cascade lasers emitting close to 25 µm

InAs-based quantum cascade lasers emitting close to 25 µm

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Indium arsenide (InAs)-based quantum cascade lasers (QCLs) operating close to 25 µm are reported. Thick n-doped InAs cladding layers were used for optical confinement. Fabry–Perot lasers exhibited a threshold current density as low as 1.1 kA/cm2 in pulsed mode at 80 K. The lasers operated in this regime up to 240 K, where the threshold current density increased up to 1.7 kA/cm2. These are the lowest threshold current densities for QCLs operating above 20 µm.

References

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      • 1. Kittel, C., Fong, C.Y.: ‘Quantum theory of solids’, vol. 3, (Wiley, New York, 1963).
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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2018.6413
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