H. Lotfi, L. Lei, L. Li, R. Q. Yang, J. C. Keay, M. B. Johnson, Y. Qiu, D. Lubyshev, J. M. Fastenau, W. K. Liu, “Long-wavelength interband cascade infrared photodetectors operating above room temperature”, Quantum Sensing and Nanophotonic Devices XII at Photonics West, San Francisco, CA, Feb. 8-12, 2015 (in Proc. SPIE. 9370, 937032).