Figure 4
From: Coherent Generation of Photo-Thermo-Acoustic Wave from Graphene Sheets
Interference effect and phase control.
(a) Time domain signal of MLG sound at different laser repetition rates. Additional offset has been applied to the curves for clarity. (b) Numerical simulation of the phase control. The superposition of two consecutive acoustic waves gives the well-simulated signal displayed in (a). (c) False color mapping of the time-domain signal at the different laser repetition rates shown in (a). (d) Analytical result for the phase control. Constructive and destructive effects are controlled by tuning the repetition rate. The dots are the experimental results shown in (a) and the solid curve is a plot of our theoretical equation. The inset shows the result with a fixed average laser power.
