posted on 2025-08-01, 12:10authored byAshley Sargent, Kevin Smith, Xianghan Xu, Kai Du, Sang-Wook Cheong, Lukas Wehmeier, G. Carr, Janice Musfeldt
The Supplementary Material includes far-field spectroscopy measurements, additional information on the experimental set-up for the synchrotron-based near-field infrared spectroscopy measurements and phonon lifetime calculations.