Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-19189-1, published online 23 January 2018

In Figure 1, there is a typographical error in the y-axis of the scale bar. The correct Figure 1 appears below.

Figure 1
figure 1

EL spectra of a 975 μm long (GaIn)As/Ga(AsSb)/(GaIn)As double “W”-QWH laser at a temperature of 23 °C. All spectra shown here are recorded below laser threshold for current densities between 0.10 kA/ cm2 and 0.84 kA/cm2. The spectra are normalized with respect to the 0.84 kA/cm2 measurement and monochromator slit widths of 150 μm are used for all measurements.