Author Correction: Ultralow-loss polaritons in isotopically pure boron nitride

Correction to: Nature Materials https://doi.org/10.1038/nmat5047, published online 11 December 2017.

In the version of this Letter originally published, the isotopic enrichments in the caption of Fig. 1a were incorrectly given as “red—¹⁰B 98.7%, purple—natural abundant, brown—¹⁰B 51%, cyan—¹¹B 83% and blue—¹¹B 99.2%”; they should have read “red—¹¹B 99.2%, purple—natural abundant, brown—¹⁰B 51%, cyan—¹⁰B 83% and blue—¹⁰B 98.7%”.