Nature Photonics 1, 119–122 (2007)

In this Letter, the bottom left label of Fig. 1a was incorrect, it should have read "34 pairs of n-doped DBRs at the bottom" as below.

Figure 1: VCSEL integrated with an HCG.
figure 1

a, Schematic cross-sectional layout of the VCSEL with the top mirror consisting of a freely suspending HCG and four pair DBRs. b, SEM image of a fabricated HCG-integrated VCSEL, where the grating is aligned with the centre of the device mesa. c, Close-up SEM image of the freely suspended grating, where a stress-relief trench is used to eliminate buckling of the grating. d, Zoomed-in SEM image of the fabricated individual grating stripes.