Femtosecond laser-induced hard X-ray generation in air from a solution flow of Au nano-sphere suspension using an automatic positioning system.
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.
Wei-Hung
WH
Hsu
Frances Camille P
FC
Masim
Matteo
M
Porta
Mai Thanh
MT
Nguyen
Tetsu
T
Yonezawa
Armandas
A
Balčytis
Xuewen
X
Wang
Lorenzo
L
Rosa
Saulius
S
Juodkazis
Koji
K
Hatanaka