Fig. 2: The extracted H–O–H bending mode contributions.
From: Vibrational couplings and energy transfer pathways of water’s bending mode

a IR, b Raman, and c hyper-Raman spectra of various H2O-D2O mixtures. d Comparison of the full widths at half maximum (FWHM) for the H–O–H bending mode contributions and the O–H stretch mode spectra. The O–H stretch IR and Raman data are extracted from refs. 49,50, respectively. The error bars correspond to the uncertainty of the FWHMs when using the sample with the different concentration for obtaining the H–O–D bending spectrum for the background subtraction (see Supplementary Note 7).