This article [Opt. Eng. 52(8), 087106 (2013)] was originally published on 16 August 2013 with an error in Section 3, where the bandgaps of the and layers were incorrectly stated. The correct bandgap of the layer is and that of the layer is . The correction does not affect any qualitative or quantitative results and conclusions. We thank Mikhail Shuba (Penn State) for helping to identify the error.
The paper was corrected online on 3 December 2014.