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Metamorphic laser heterostructures In(Sb, As)/In0.81Ga0.19As/In0.75Al0.25As with InSb/InAs/InGaAs composite quantum wells based on submonolayer InSb insertions in a 10-nm InAs layer have been grown by molecular beam epitaxy on GaAs (001) substrates. Stimulated emission at a wavelength of λ ~ 2.86 μm at temperatures of 10–60 K at optical pumping has been demonstrated in such structures without an optical...
Metamorphic InAs(Sb)/InGaAs/InAlAs quantum-confined heterostructures with thin (1–5 nm) strongly mismatched GaAs and InAs inserts in a gradient metamorphic InxAl1−xAs buffer layer have been grown on GaAs (001) substrates by molecular beam epitaxy. It has been shown that the use of a 5-nm GaAs insert in the region of a metamorphic buffer layer at x ~ 0.37 almost doubles the photoluminescence intensity...
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