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Electrical injection type-II (GaIn)As/Ga(AsSb)/(GaIn)As single ‘W’-quantum well laser at 1.2 µm

Electrical injection type-II (GaIn)As/Ga(AsSb)/(GaIn)As single ‘W’-quantum well laser at 1.2 µm

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Highly efficient interface-dominated electrical injection lasers in the near-infrared regime based on the type-II band alignment in (GaIn)As/Ga(AsSb)/(GaIn)As single ‘W’-quantum wells are realised. The structure is designed by applying a fully microscopic theory, grown by metal organic vapour phase epitaxy, and characterised using electroluminescence measurements and broad-area laser studies. A characteristic blue shift of 93 meV/(kA/cm2) with increasing charge carrier density is observed and compared with theoretical investigations. Low threshold current densities of 0.4 kA/cm2, high differential efficiencies of 66%, optical output powers of 1.4 W per facet, and internal losses of only 1.9 cm−1 are observed at a wavelength of 1164 nm for a cavity length of 930 µm. For a cavity length of 2070 µm, the threshold current density is reduced to 0.1 kA/cm2. No indication for type-I related transitions for current densities up to 4.6 kA/cm2 is observed.

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http://iet.metastore.ingenta.com/content/journals/10.1049/el.2016.2851
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