Correction to: Nature Photonics https://doi.org/10.1038/s41566-018-0135-2, published online 26 March 2018.
In the version of this Article originally published, in equation (9), the ‘Δ’ in the first 'Δfrep' shouldn’t have been included; the equation should have read
And, in equation (10), within the brackets, frep and f were the wrong way round; the equation should have read
These equations have now been corrected in the online versions.
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Muraviev, A.V., Smolski, V.O., Loparo, Z.E. et al. Publisher Correction: Massively parallel sensing of trace molecules and their isotopologues with broadband subharmonic mid-infrared frequency combs. Nature Photon 12, 437 (2018). https://doi.org/10.1038/s41566-018-0196-2