Influence of composition in InAs/GaSb type-II superlattices on their optical properties

Influence of composition in InAs/GaSb type-II superlattices on their optical properties

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An experimental investigation of the optical properties of mid-wave infrared (MWIR) InAs/GaSb type-II superlattices (T2-SLs) with different compositions is presented. The temperature-dependent absorption spectra of MWIR T2-SLs are extracted from optical transmission measurements. The results show that the optical properties in T2-SLs are closely related to the composition of the superlattice. The absorption coefficient increases with increased temperature, due to bandgap narrowing. The influence of scattering/broadening on the shape of the absorption spectra is also discussed.


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      • 3. Ariyawansa, G., Steenbergen, E., Bissell, L.J., Duran, J.M., Scheihing, J.E., Eismann, M.T.: ‘Absorption characteristics of mid-wave infrared type-II superlattices’, Proc. SPIE, 2014, 9070, p. 90701J.
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