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Two-photon resonant excitation of a doubly excited state in He atoms by high-harmonic pulses

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Title: Two-photon resonant excitation of a doubly excited state in He atoms by high-harmonic pulses
Authors: Sekikawa, Taro Browse this author →KAKEN DB
Okamoto, Tatsuya Browse this author
Haraguchi, Eisuke Browse this author
Yamashita, Mikio Browse this author →KAKEN DB
Nakajima, Takashi Browse this author
Issue Date: 22-Dec-2008
Publisher: Optical Society of America
Journal Title: Optics Express
Volume: 16
Issue: 26
Start Page: 21922
End Page: 21929
Publisher DOI: 10.1364/OE.16.021922
Abstract: We experimentally demonstrate a two-color two-photon resonant excitation of the doubly excited 2p2 1S state in helium atoms by the combination of 19th and 21st harmonic photons of a Ti:sapphire laser. Production of the 2p2 1S state is confirmed by the experimental observation that the electron emission from this state does not depend on the direction of harmonic polarization. Our ab-initio theoretical results through the solution of time-dependent Schrödinger equation are consistent with the experimental results and confirm the first successful production of a doubly excited state by high-harmonic pulses.
Rights: ©2008 Optical Society of America
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 山下 幹雄

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