R. Q. Yang, Z. Tian, Z. Cai, J. F. Klem, T. D. Mishima, M. B. Santos, M. B. Johnson, “Quantum-Engineered Interband Cascade Infrared Photodetectors” (invited), at 10th International Conference on Mid-Infrared Optoelectronics Materials and Devices, Shanghai, China, Sept. 5-9, 2010.