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

Author

Sekikawa, Taro ; Okamoto, Tatsuya ; Haraguchi, Eisuke ; Yamashita, Mikio ; Nakajima, Takashi

Author_Institution

Dept. of Appl. Phys., Hokkaido Univ., Sapporo, Japan

fYear

2009

fDate

2-4 June 2009

Firstpage

1

Lastpage

2

Abstract

We demonstrate the two-photon resonant excitation of the doubly excited 2p² ¹S state in helium atoms by the combination of 29.5- and 32.6-eV harmonic photons. Our ab-initio calculation confirms the nonlinear excitation by high harmonics.

Keywords

ab initio calculations; atom-photon collisions; helium; laser beams; optical harmonic generation; quantum optics; two-photon processes; He; ab-initio calculation; doubly excited state; electron volt energy 29.5 eV; electron volt energy 32.6 eV; helium atoms; high-harmonic generation; high-harmonic pulse; laser beam polarization; nonlinear excitation; two-photon resonant excitation; Atom optics; Electrons; Helium; Laser excitation; Nonlinear optics; Optical pulses; Power harmonic filters; Resonance; Spectroscopy; Ultrafast optics; (190.4160) Multiharmonic generation; (190.4180) Multiphoton processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2009 and 2009 Conference on Quantum electronics and Laser Science Conference. CLEO/QELS 2009. Conference on

Conference_Location

Baltimore, MD

Print_ISBN

978-1-55752-869-8

Electronic_ISBN

978-1-55752-869-8

Type

conf

Filename

5224603