Femtosecond-Laser-Induced Nanocavitation in Water: Implications for Optical Breakdown Threshold and Cell Surgery

Alfred Vogel, Norbert Linz, Sebastian Freidank, Günther Paltauf
2008 Physical Review Letters  
We determined the bubble radius R max for femtosecond optical breakdown in water at 347, 520, and 1040 nm with an unprecedented accuracy ( 10 nm). At threshold, R max was smaller than the diffractionlimited focus radius and ranged from 190 nm to 320 nm. The increase of R max with laser energy E L is slowest at 347 nm, providing optimum control of cell surgery. Experimental results agree with a model of bubble formation in heated and thermoelastically stretched liquids. Theory predicts a
more » ... predicts a threshold temperature T th 168 C. For T > 300 C, a phase explosion sets in, and R max increases rapidly with E L .
doi:10.1103/physrevlett.100.038102 pmid:18233040 fatcat:3wcj5d773zc7hcgeecpk76ne7i