Figure 3

SEM images of the cross-sections of the samples modified by 1030 nm wavelength showing different microstructures created by filament propagation inside the PLLA with different pulse spacing: (a) IR_30 and (b) IR_15.

SEM images of the cross-sections of the samples modified by 1030 nm wavelength showing different microstructures created by filament propagation inside the PLLA with different pulse spacing: (a) IR_30 and (b) IR_15.