Quantification of impulse

Quantification of femtosecond laser-induced impulsive force

We developed new method to quantify the impulsive force utilizing atomic force microscope (AFM). The femtosecond laser is focused in the vicinity of the AFM cantilever and the impulsive force loaded on the cantilever was detected as a transient vibration of the cantilever. The force generated at the laser focal point was analyzed from the bending movement and quantified from a motion equation. By the quantification, we opened new way to use the impulse as an external force to estimate kinetic interaction of cell and tissue, as well as force to manipulate small object made from these materials.

<Figure 1>

<Figure 1>Experimental setup to quantify the femtosecond laser-induced impulsive force by AFM cantilever under microscope. The impulsive force is detected as a transient vibration of the cantilever.

Takanori Iino, Yoichiroh Hosokawa, "Direct Measurement of Femtosecond Laser Impulse in Water by Atomic Force Microscopy ," Appl. Phys. Exp., vol.3, pp107002-1 -107002-3.(2010)