Figure 3
From: In vivo sub-femtoliter resolution photoacoustic microscopy with higher frame rates

The power dependency of the photoacoustic signals within Rhodamine B solution (100 mM Rhodamine B in methanol, RhB(MeOH)).
Reference lines (black dashed lines) with fitted slopes are given. a, best-fitted power dependence slope; R2, R-squared value of linear regression.