Picosecond imaging of dynamics of solvated electrons during femtosecond laser-induced plasma generation in water
Abstract
The dynamics of solvated electrons were visualized using absorption imaging with sub-picosecond time resolution based on a pump–probe measurement during the early stages of femtosecond laser-induced plasma generation in water. The solvated electrons were generated by the propagation of a femtosecond laser pump pulse. In the area with a pump laser intensity over 2 × 1013 W/cm2, where a high density of free electrons was produced, solvated electrons exhibited an additional rapid increase in optical density (OD) at 800 nm, 7–9 ps after the pump pulse excitation. In contrast, no two-step increase in OD was observed when probed at 400 nm, suggesting that the absorption coefficient of the solvated electrons rapidly changed around 800 nm after femtosecond laser excitation for a few picoseconds. This observation might indicate the structural and electronic modulation of solvated electrons owing to the high density of free electrons in water, accompanied by femtosecond-laser-induced plasma generation.
Article Details
Journal Info
The Journal of Chemical Physics
American Institute of Physics
Authors (6)
Noritaka Sakakibara
Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 1 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561,
Tsuyohito Ito
Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 1 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561,
Yukiya Hakuta
AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST) 2 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589,
Yoshiki Shimizu
AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST) 2 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589,
Kazuo Terashima
Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo 1 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561,
Eisuke Miura
AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL), National Institute of Advanced Industrial Science and Technology (AIST) 2 , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8589,