Fig. 1: Raman excitation mapping of SWCNTs and map evolution.

a Schematic of broadband illumination and light collection. Angularly dispersed supercontinuum light creates a rainbow line on the sample which is analyzed. b Schematic sample evolution. Comparatively pristine SWCNTs are damaged by illumination. c REM of a (7,6) sample at the beginning of the measurements. RS from different phonon modes are visible as diagonal lines of signal intensity. Bands are labeled according to their tabulated names (see main text). d REM of the same (7,6) film after intense light exposure. e Difference plot highlighting the changes between the initial and final REM scattering intensities where red indicates an increase and blue indicates a decrease (noise is on the order of 30 counts). The dotted lines mark the expected position of the (7,6) E₂₂ exciton optical absorption resonance based on ref. ¹ from a surfactant-water dispersion. For all panels the color scale is in counts. Color scales are saturated and chosen to best reveal weak features - see Supplementary Fig. 3 for unsaturated versions. There is little change in RS for excitation <1.95 eV due to the illumination intensity profile and necessary filters. Videos of this evolution are shown in the Supplementary Information (Supplementary Movies 1, 2 and 5).