Author Correction: Reflection from a free carrier front via an intraband indirect photonic transition

The original version of this article contained an error in first sentence of the Acknowledgements, which incorrectly read ‘M.A.G, D.J., A.Y.P. and M.E. acknowledge the support of the German Research Foundation under grant no. EI 391/13-2, and appreciate the support of CST, Darmstadt, Germany, with their Microwave Studio Software.’ The correct version states ‘261759120’ in place of ‘EI 391/13-2’. This has been corrected in both the PDF and HTML versions of the article.