In this work, the main peculiarities of Laser Induced Plasma (LIP) in liquid have been
investigated by comparing the evolution of the LIP in water and in air. To this end, fast
shadowgraphy and temporally resolved emission spectroscopy were used. The
experimental results reveal a scenario where plasma under water remains in a high-density
state, characterized by the condensation of electronic levels as a consequence of the
confinement effect of the surrounding water. In this case, the plasma emission spectrum …