Fig. 2
Characterisation of network lasing modes. Far-field images of the lasing network corresponding to three different lasing modes, at wavelengths: a 579.3 ± 0.1 nm, b 584.3 ± 0.1 nm and c 592.4 ± 0.1 nm. The dashed black circle indicates the pump area. Scale bar is 100 μm. d Spectral data from the entire area shown in a. Coloured circles indicate the lasing peaks corresponding to the hyperspectral images (a–c). Hyperspectral images were obtained by scanning the lens in front of the spectrometer (e) and collecting spectral data from different areas of the sample. f Normalised mode spacing statistics obtained from experimentally measured lasing spectra from different parts of the sample. The distribution is well fitted by an exponential curve (dashed line) up to the experimental spectral resolution indicated by the grey band. Wigner-Dyson distribution (dotted line) is also shown for comparison
