Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-16850-z, published online 29 November 2017

The Acknowledgements section in this Article is incomplete.

“Advanced Research Foundation, grant #7/019/2014-2017, supported the laser inscription experiments. Ministry of Education of Science of Russian Federation, grant #14.Z50.31.0009, have funded measurement, math treatment and analysis of the obtained data. The authors are grateful to Dr. R. Drevinskas for discussions of methods for measuring the optical phase.”

should read:

“Advanced Research Foundation, grant #7/019/2014-2017, supported the laser inscription experiments. Ministry of Education of Science of Russian Federation, grant #14.Z50.31.0009, have funded measurement, math treatment and analysis of the obtained data. A part of the study related to the measurements of refractive index change was also supported by the Royal Society (UK) International Exchanges Program (Grant IE150203). The authors are grateful to Dr. R. Drevinskas for helpful discussions.”