The design and experimental realization of a type-II "W"-multiple quantum well heterostructure for emission in the λ > 1.2 m range is presented. The experimental photoluminescence spectra for different excitation intensities are analyzed using microscopic quantum theory. On the basis of the good theory-experiment agreement, the gain properties of the system are computed using the semiconductor Bloch equations. Gain values comparable to those of type-I systems are obtained.
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| http://dx.doi.org/10.1063/1.4917180 | DOI Listing |
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