Open AccessDynamic position shifts of X-ray emission from a water film induced by a pair of time-delayed femtosecond laser pulses
Author(s) -
Wei-Chou Hsu,
Frances Camille P. Masim,
Armandas Balčytis,
Saulius Juodkazis,
Koji Hatanaka
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.024109
Subject(s) - femtosecond , optics , laser , materials science , femtosecond pulse shaping , excitation , pulse (music) , irradiation , x ray , atomic physics , physics , quantum mechanics , detector , nuclear physics
Femtosecond double-pulsed laser excitation of a water film in air showed enhancements of X-ray intensity as compared with single pulse irradiation. The position of the highest yield of X-rays strongly depends on temporal separation between the pre-pulse and the main-pulse (energy ratios where ∼ 1 : 10). The strongest X-ray emission was observed at 10-15 ns delay of the main-pulse. Nanoscale roughening of water surface can account for the observation.