Scientific Reports 5: Article number: 16055; published online: 04 November 2015; updated: 19 January 2017.

The original version of this Article contained a typographical error in Reference 24, which was incorrectly given as:

T. Tufarelli, K. R. McEnery, S. A. Maier & M. S. Kim. Phys. Rev. A 89, 023817 (2014).

This has been corrected in the HTML and PDF versions of this Article.