Figure 3: Power Fourier spectra of the pump-probe reflection signals measured in 3 locations on the InSe nanolayer with d = 114 nm.
From: Nanomechanical probing of the layer/substrate interface of an exfoliated InSe sheet on sapphire

The upper and lower insets show an example of the temporal evolution of the measured signal before and after subtracting the slow decaying background, respectively. The solid line in the lower inset is the fit to the experimental data using Eq. (1).