Correction to: Nature Photonics, published online 20 April 2020.

In the version of this Article originally published online, in the following text in the second sentence of the Acknowledgements “Air Force Office of Scientific Research, Air Force Material Command, USAF under award no. FA9550-15-1-0099”, ‘Material’ should have read ‘Materiel’ and the award number should have been ‘FA9550-15-1-0250’. All versions of the Article have been amended.