Brillouin Spectroscopy in a Diamond Anvil Cell
A quick test was conducted using water in a diamond anvil cell (DAC) set to approximately 1 GPa. The measured frequency shift of such pressurized water is 15.91 ± 0.02 GHz, in line with Li et al. This shift is significantly different from that of water at atmospheric pressure (7.48 ± 0.01 GHz).
