Optical gain enhancement and wavefunction confinement tuning in AlSb/InGaAsP/GaAsSb heterostructuresAmit Kumar Singh, Rohit Singh, Kulwant Singh and Amit RathiEur. Phys. J. B, 94 6 (2021) 123DOI: https://doi.org/10.1140/epjb/s10051-021-00131-w