Ultrafast two-photon Rabi oscillations in excited He driven by femtosecond intense laser fields

29th International Conference on Photonic, Electronic, and Atomic Collisions

Hishikawa, A.^1 ; Fushitani, M.^1 ; Liu, C.-N.^2 ; Matsuda, A.^1 ; Endo, T.^1 ; Toida, Y.^1 ; Hikosaka, Y.^3 ; Morishita, T.^4

Department of Chemistry, Graduate School of Science, Nagoya University, Nagoya, Aichi

464-8602, Japan^1

Department of Physics, Fu-Jen Catholic University, Taipei

24205, Taiwan^2

Department of Environmental Science, Faculty of Science, Niigata University, Niigata, Niigata

950-2181, Japan^3

Department of Engineering Science, University of Electro-Communications, 1-5-1 Chofu, Tokyo

182-8585, Japan^4

关键词: Coherent excitations;    Intense laser field;    Multiphotons;    Near Infrared;    Rabi oscillations;    Theoretical calculations;    Time dependent Schrodinger equation;    Two-photon coupling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/9/092082/pdf
DOI  :  10.1088/1742-6596/635/9/092082

来源: IOP

【 摘 要 】

We demonstrate ultrafast multiphoton coherent excitation in near-infrared intense laser fields (≤10 TW/cm2) using excited helium in the 1s2p (1P) state as the target. Strong two-photon coupling between the 2p state and the 5f and 6f Rydberg states drives ultrafast Rabi oscillations in tens of femtosecond. Theoretical calculations solving the time-dependent Schrodinger equation were carried out to elucidate the strong field effects.