J. A. Gupta, G. C. Aers, E. Dupont, J. Baribeau, X. Wu, Y. Jiang, L. Li, R. Q. Yang, and M. B. Johnson “MBE Growth of Type-I interband cascade lasers near 3.2 μm”, paper Tu-05, at The 31st North American Conference on Molecular Beam Epitaxy (NAMBE 2015) , Mayan Riviera, Mexico, October 4 – 7, 2015.