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Nishikino, Masaharu; Hasegawa, Noboru; Tomita, Takuro*; Eyama, Tsuyoshi*; Kakimoto, Naoya*; Hatomi, Daiki*; Onishi, Naofumi*; Baba, Motoyoshi*; Kawachi, Tetsuya; Yamagiwa, Mitsuru; et al.
no journal, ,
no abstracts in English
Tsubouchi, Masaaki; Ochi, Yoshihiro; Tanaka, Momoko; Yoshida, Fumiko; Nagashima, Keisuke
no journal, ,
We have developed high repetition (1 kHz) intense THz laser light source for the molecular axis control by non-linear interaction between intense THz light and molecules.
Itakura, Ryuji; Fushitani, Mizuho*; Hishikawa, Akiyoshi*; Sako, Tokuei*
no journal, ,
In ultrafast photoionization, the spectra width in the photoelectron spectrum is broadended and then the peaks are overlapped, resulting in the coherent superposition of correlated photoelectron and ionic states. In this study, the wave packet picture of correlated photoelectron and ion core is formulated. Numerical simulation is carried out for photoionization of Ar into two spin-orbit split states as a model case. The temporal evolution of ion core dynamics following photoelectron emission will be discussed.
Yatsuka, Eiichi; Hatae, Takaki; Bassan, M.*; Vayakis, G.*; Walsh, M.*; Itami, Kiyoshi
no journal, ,
no abstracts in English
Yogo, Akifumi; Kondo, Kiminori; Mori, Michiaki; Kiriyama, Hiromitsu; Ogura, Koichi; Shimomura, Takuya; Fukuda, Yuji; Sakaki, Hironao; Jinno, Satoshi; Kanasaki, Masato; et al.
no journal, ,
no abstracts in English
Terada, Takaya; Nishimura, Akihiko
no journal, ,
no abstracts in English
Ochi, Yoshihiro; Tsubouchi, Masaaki; Tanaka, Momoko; Yoshida, Fumiko; Nagashima, Keisuke; Sugiyama, Akira
no journal, ,
We will present current status of a driver laser system for intense THz wave generation. The driver laser system, QUADRA-T, is a 1 kHz repetition CPA laser equipped with Yb:YAG thin disk amplifier. Current output power from a regenerative amplifier is about 10 W (10 mJ/pulse). Upgrade to 100W class power output using a multi-pass amplifier is the next plan.
Nishimura, Akihiko; Terada, Takaya; Takenaka, Yusuke*; Furuyama, Takehiro*; Shimomura, Takuya; Ioki, Kimihiro*
no journal, ,
no abstracts in English
-raysKosuge, Atsushi; Mori, Michiaki; Okada, Hajime; Hajima, Ryoichi; Nagashima, Keisuke
no journal, ,
By using a three-mirror image inverter which inverts a phase of the specific polarizing direction, we can obtain an error signal to lock a cavity without any transmission element and also select the polarizing direction.
Matsubara, Shinichi*; Aoyama, Makoto; Iwasaki, Atsushi*; Okayasu, Yuichi*; Ogawa, Kanade*; Owada, Shigeki*; Sato, Takahiro*; Takahashi, Eiji*; Tanaka, Takashi*; Togashi, Tadashi*; et al.
no journal, ,
no abstracts in English
Hasegawa, Noboru; Nishikino, Masaharu; Tomita, Takuro*; Takei, Ryota*; Eyama, Tsuyoshi*; Kakimoto, Naoya*; Hatomi, Daiki*; Onishi, Naofumi*; Baba, Motoyoshi*; Kawachi, Tetsuya; et al.
no journal, ,
We have observed the temporal evolution of the femto-second laser irradiated metal surface by using the soft X-ray laser probe at the wavelength of 13.9 nm. The initial dynamics of the fs-laser ablation is quite rapid (
a few ps) and the dynamics of the laser processing is kept for a long time. We have developed a new pump and probe system to measure these phenomena by the same set-up. By using this system, we have succeeded to obtain the temporal evolution of the ablation front exfoliated from the laser ablated gold surface.