Abstract
We investigate substrate removal techniques for GaSb epilayers grown on GaAs substrates. The GaSb epilayers are grown metamorphically on the GaAs substrate by inducing large areas of 90° interfacial misfit dislocation arrays at the GaSb/GaAs interface. Three structures have been investigated, each with a different etch stop process such that the GaAs substrate is removed without affecting the GaSb epi-layer. The GaSb membranes upon isolation are characterized for crystal quality using x-ray diffraction and for surface quality using atomic force microscopy.
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