1. M. D. Petroff and M. G. Stapelbroek, Blocked Impurity Band Detectors (United States Patent No. 4 568 960, February 4, 1986).
2. N. Sclar, Quantum Electron. 9, 149 (1984).
3. F. Szmulowicz and F. L. Madarsz, J. Appl. Phys. 62, 2533 (1987).
4. Sh. M. Kogan, Zh. Eksp. Teor. Fiz. 81, 2268 (1981) [Sov. Phys. JETP 54, 1203 (1981)].
5. S. Pasquier, G. Sirmain, C. Meny, A. Murray, M. Criffin, P. Ade, L. Essaleh, J. Galibert, and J. Leotin, in Proceedings of the Eighth International Conference on Millimeter and Submillimeter Waves and Applications (San Diego, 1994), p. 35.