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- Title
Heterostructures for quantum-cascade lasers of the wavelength range of 7-8 μm.
- Authors
Babichev, A.; Gladyshev, A.; Filimonov, A.; Nevedomskii, V.; Kurochkin, A.; Kolodeznyi, E.; Sokolovskii, G.; Bugrov, V.; Karachinsky, L.; Novikov, I.; Bousseksou, A.; Egorov, A.
- Abstract
It is shown that molecular-beam-epitaxy technology can be used to fabricate heterostructures for quantum-cascade lasers of the wavelength range of 7-8 μm with an active region comprising 50 cascades based on a heterojunction of InGaAs/AlInAs solid solutions. The optical emission is obtained using a quantum-cascade design operating on the principle of two-phonon resonance scattering. The properties of heterostructures were studied by the methods of X-ray diffraction and transmission electron microscopy, which showed their high quality with respect to the identical compositions and thicknesses of all 50 cascades. Stripe-geometry lasers made of these heterostructures exhibited lasing with a threshold current density below 1.6 kA/cm at a temperature of 78 K.
- Subjects
SEMICONDUCTOR lasers; WAVELENGTHS; MOLECULAR beam epitaxy; HETEROJUNCTIONS; INDIUM gallium arsenide; SOLID solutions; X-ray diffraction
- Publication
Technical Physics Letters, 2017, Vol 43, Issue 7, p666
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/S1063785017070173