Correction to: Nature Reviews Physics https://doi.org/10.1038/s42254-022-00472-0, published online 5 July 2022.

In the version of the article initially published, there was a typographical error in the second affiliation shown for Qiaoliang Bao, which has now been corrected to read “Nanjing kLight Laser Technology, Nanjing, China” in the HTML and PDF versions of the article.