Experimental investigation on nanowire array irradiated with ultrahigh intensity laser at x-ray free electron laser facility SACLA: Fabrication of nanowire array target and its application to ultrafast time-resolved measurements
Abstract
Nanowire arrays—vertically aligned metal wires with a few hundred nanometers in diameter—are promising nano-structured targets for high-energy-density physics and related applications. We have been developing ultrafast, time-resolved measurements on laser-irradiated targets using the x-ray free electron laser at the SACLA facility. Here, we present fabrication of various kinds of nanowire array in order to explore the absorption mechanism with ultrahigh intensity laser irradiation, and their application to the laser-irradiation experiment is performed at the SACLA facility. To fabricate nanowire arrays with control over their spatial and material parameters, we have developed an approach using an anodic aluminum oxide template and electroplating processes. The nanowire array samples were applied for ultrahigh intensity laser experiments, which coupled with x-ray free-electron-laser facility SACLA. We characterized fundamental “static” data on transmittance calibration for x-ray shadowgraph measurements. We also evaluated the effect of a pre-pulse on spatial changes of a nanowire, showing that the shape of the nanowires was maintained up to a few picoseconds after laser irradiation. On the preliminary laser-irradiation experiments, we observed time-resolved, two-dimensional x-ray images and observed the x-ray transmittance change due to the heating process.
Article Details
Journal Info
Journal of Applied Physics
American Institute of Physics
Authors (18)
D. Tanaka
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
H. Sawada
University of Nevada Reno 2 Department of Physics, , Reno, Nevada 89557,
T. Idesaka
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
C. Nakatsuji
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
S. Matsuura
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
T. Sato
T. Somekawa
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
T. Yabuuchi
Japan Synchrotron Radiation Research Institute 4 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198,
K. Miyanishi
RIKEN SPring-8 Center 5 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148,
K. Sueda
RIKEN SPring-8 Center 5 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148,
Y. Inubushi
Japan Synchrotron Radiation Research Institute 4 , 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198,
Y. Sentoku
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
T. Shimizu
Graduate School of Science and Engineering, Kansai University 6 , 3-3-35 Yamate-cho, Suita, Osaka 564-8680,
S. Shingubara
Graduate School of Science and Engineering, Kansai University 6 , 3-3-35 Yamate-cho, Suita, Osaka 564-8680,
K. Kawasaki
Lawrence Livermore National Laboratory , Livermore, California 94550,
N. Ozaki
K. Yamanoi
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,
K. Shigemori
Institute of Laser Engineering, Osaka University 1 , 2-6 Yamada-oka, Suita, Osaka 565-0871,