Particle Size Dependence of Correlation between Plasma Emission Delay Time and Plasma Emission Intensity of Laser Breakdown Induced by a Particle

Plasma emission delay time and plasma emission intensity of laser breakdown induced by a polystyrene particle in water were measured simultaneously. Short plasma emission delay time tended to correspond to high plasma emission intensity, as expected from the spatial and temporal profiles of the laser pulse power density. Particle size dependence of the correlation between the two parameters may serve in the measurement of the particle size.