Open AccessFemtosecond laser-induced hard X-ray generation in air from a solution flow of Au nano-sphere suspension using an automatic positioning system
Author(s) -
Wei-Chou Hsu,
Frances Camille P. Masim,
Matteo Porta,
Mai Thanh Nguyen,
Tetsu Yonezawa,
Armandas Balčytis,
Xuewen Wang,
Lorenzo Rosa,
Saulius Juodkazis,
Koji Hatanaka
Publication year - 2016
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.24.019994
Subject(s) - optics , femtosecond , suspension (topology) , laser , distilled water , materials science , nano , absorption (acoustics) , physics , mathematics , homotopy , pure mathematics , composite material , thermodynamics
Femtosecond laser-induced hard X-ray generation in air from a 100-µm-thick solution film of distilled water or Au nano-sphere suspension was carried out by using a newly-developed automatic positioning system with 1-µm precision. By positioning the solution film for the highest X-ray intensity, the optimum position shifted upstream as the laser power increased due to breakdown. Optimized positioning allowed us to control X-ray intensity with high fidelity. X-ray generation from Au nano-sphere suspension and distilled water showed different power scaling. Linear and nonlinear absorption mechanism are analyzed together with numerical modeling of light delivery.