Design of InAs/Ga(In)Sb Superlattices for Infrared Sensing
Abstract
New infrared detector materials with high sensitivity, multi-spectral capability, improved uniformity and lower manufacturing costs are required for numerous infrared sensing applications. One material system has shown great theoretical and experimental promise for these applications: InAs/InxGa1KxSb type-II superlattices. These superlattices offer a large design space for adjusting not only the energy band gap of the material but also the band structure. The infrared properties of several sets of designs of InAs/GaSb superlattices were studied. These designs covered the mid-infrared spectral band from 3 to 6 mm. Optimization design rules were explored. The infrared photoresponse spectra, combined with 8x8 k dot p envelope function approximation modeling of superlattice band gaps and absorption spectra, provide insight into the underlying physics behind the optimized design of these materials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 2005
- Accession Number
- ADA521999
Entities
People
- Frank Szmulowicz
- G. J. Brown
- H. J. Haugan
- K. Mahalingam
- S. Houston
Organizations
- Air Force Research Laboratory