This data supports the manuscript: "Flickering nanometre-scale disorder in a crystal lattice tracked by plasmonic flare light emission". All raw data was obtained as spectra: light imaged through an Andor Shamrock 303i-B spectrometer onto an Andor Newton EMCCD. This dataset also contains extracted, aggregated data extracted from many spectra and values from theoretical calculations to reproduce figures given in the text.

In detail:

Figure 1 Top panel in Figure 1d is given by plotting 'bpt_spectra_grey' vs 'wavelength' (grey bpt spectrum) and 'pico_spectra_purple' vs 'wavelength' (purple picocavity spectrum) Bottom panel in Figure 1d is given by plotting 'bpt_spectra_grey' vs 'wavelength' (grey bpt spectrum) and 'flare_spectra_blue' vs 'wavelength' (blue flare spectrum)

Top panel in Figure 1e is given by ‘kinetic_pico_spectra_purple’ with the y axis given by ‘time’ and x axis given by ‘wavelength’ Bottom panel in Figure 1e is given by 'kinetic_flare_spectra_blue' with the y axis given by ‘time’ and x axis given by ‘wavelength’

Figure 2 The raw spectra in Figure 2a are given by 'raw_data' with the x axis 'wavelength'. The Gaussian fits are given by 'fitted_data' vs 'wavelength'.

The density plot in Figure 2b is given by plotting 'coupled_wavelength' vs 'flare_wavelength'. The corresponding histograms are given by plotting a histogram of each distribution individually.

The grey spectra in Figure 2c are given by 'raw_data' vs 'wavelength_raw_data'. The blue fitted flare is given by 'flare' vs 'wavelengts_flare'. The dashed red corresponding dark-field spectrum is given by 'darkfield' vs 'wavelengths_darkfield'

The grey raw data in Figure 2d is given by 'raw_data' vs 'wavelength_raw_data'. The corresponding fits are given by 'fitted_data' vs 'wavelength_fitted_data'. The blue fitted flare is given by 'flare' vs 'wavelength_flare'. The dashed red corresponding dark-field spectrum is given by 'darkfield' vs 'wavelengths_darkfield'.

The scattering intensities in Figure 2e for white-light only (blue), white-light & laser (purple) and laser only (green) are given by 'white_only', 'white_and_laser', and 'laser_only' respectively. The x-axis is given by 'delta_time'.

Figure 3 The field map in Figure 3b is given by 'field_map' with an x-axis of 'x' and a z-axis of 'z'.

Figure 3c is given by plotting 'E(wp)' (dark green) and 'E(wp-dwp)' vs 'k'

Figure 3e is given by plotting 'simulated_data' vs 'wavelengths_simulated_data'

Figure 3f is given by plotting 'simulation_radius' vs 'simulation_redshift' (points) and 'analytical_radius' vs 'analytical_redshift' (dashed lines).

Figure 3g is given by plotting 'simulation_plasma_freq' vs 'simulation_redshift' (points) and 'analytical_plasma_freq' vs 'analytical_redshift' (dashed lines).

Figure 3h central pannel is given by plotting 'analytical_Ir_a=2-10' vs 'analytical_redshift_a=2-10' (dashed lines) and 'analytical_Ir_dwp=1.0-2.8' vs 'analytical_redshift_dwp=1.0-2.8) (solid lines). Left histogram is given by 'experimental_Ir'. Top bottom histogram is given by 'experimental_redshift'.

Figure 4 The blue dashed line in Figure 4a given by 'fit_14days' vs 'fit_power_14days'. Corresponding points are given by 'flares_14days' vs 'power_flares_14days'. The grey dashed line in Figure 4a given by 'fit_0days' vs 'fit_power_0days'. Corresponding points are given by 'flares_0days' vs 'power_flares_0days'.

The points in Figure 4b are given by 'flare_duration' vs 'power'. The distributions at each power (shaded blue) are given by 'flare_duration_distribution_'

The bar heights in Figure 4c are given by 'mean_num_flares'.

The bars in Figure 4d are given by 'log_percentage_NPoMs' with the x axis given by 'number_flares'.