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Metallorganic chemical vapor deposition of InAs/GaSb superlattices on GaAs substrates using a two-step InAs buffer layer

Identifieur interne : 001860 ( Main/Repository ); précédent : 001859; suivant : 001861

Metallorganic chemical vapor deposition of InAs/GaSb superlattices on GaAs substrates using a two-step InAs buffer layer

Auteurs : RBID : Pascal:12-0168289

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Abstract

InAs/GaSb type II superlattices (T2SLs) were grown heteroepitaxially, via metallorganic chemical vapor deposition (MOCVD), on GaAs substrates. The 7% lattice mismatch between the T2SL and GaAs substrate was accommodated through the use of a two-step InAs buffer layer. The periodicity of the grown structures was confirmed by X-ray diffraction (XRD). FTIR measurements of the structures yielded cutoff wavelength values from 4.9 μm to 8.7 μm, which, as expected, scaled with thickness of the InAs in the SL structure. Kronig-Penny modeling of the structures produced the general trend of the experimental data.

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Pascal:12-0168289

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<div type="abstract" xml:lang="en">InAs/GaSb type II superlattices (T2SLs) were grown heteroepitaxially, via metallorganic chemical vapor deposition (MOCVD), on GaAs substrates. The 7% lattice mismatch between the T2SL and GaAs substrate was accommodated through the use of a two-step InAs buffer layer. The periodicity of the grown structures was confirmed by X-ray diffraction (XRD). FTIR measurements of the structures yielded cutoff wavelength values from 4.9 μm to 8.7 μm, which, as expected, scaled with thickness of the InAs in the SL structure. Kronig-Penny modeling of the structures produced the general trend of the experimental data.</div>
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