Heteroengineered structures with unipolar barriers such as nBn, CBIRD, M-structure, N-structure, pBiBn and cascade structures have taken advantage of the unique bandstructure engineering properties of the 6.1A InAs/GaSb/AlSb family. In this talk, I will review some of the approaches that we have developed in our group nBn, pBiBn and interband cascade detectors. The performance characteristics of these detectors will be discussed in detail in the presentation.
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