Fig. 2: Ultra-high frequency optomechanical micro-rheology of liquid water.
From: Optomechanical micro-rheology of complex fluids at ultra-high frequency
Mechanical quality factor and normalized frequency shift in water for the fundamental RBM of a silicon disk of thickness h = 220 nm and radius a varying between 3 and 12 µm, corresponding to RBM frequency between 200 and 850 MHz. Measurements in red are compared with predictions of our calibrated (uncalibrated) model in orange (green), and with predictions of an incompressible viscous model in dashed black. a Quality factor and b frequency shift (decrease) with respect to air. The error bars represent the 95% confidence interval, with the mean as the measure of center. Contributions to errors are discussed in the Supplements.
