中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2014-2018.doi: 10.1088/1009-1963/14/10/016

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Resonant propagation of femtosecond laser pulse in DBASVP molecule:one-dimensional asymmetric organic molecule

赵珂1, 刘纪彩1, 王传奎2, 罗毅3   

  1. (1)College of Physics and Electronics, Shandong Normal University,Jinan 250014, China; (2)College of Physics and Electronics, Shandong Normal University,Jinan 250014, China;Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden; (3)Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden
  • 收稿日期:2005-04-22 修回日期:2005-07-14 出版日期:2005-10-20 发布日期:2005-10-20
  • 基金资助:
    Project supported by the Shandong Natural Science Foundation (Grant No Y2004A08), the University Doctoral Subject Special Science and Technology Foundation (Grant No 20040445001)and The Key Laboratory for High Intensity Optics of Shanghai Institute of Opt

Resonant propagation of femtosecond laser pulse in DBASVP molecule:one-dimensional asymmetric organic molecule

Zhao Ke (赵珂)a, Liu Ji-Cai (刘纪彩)a, Wang Chuan-Kui (王传奎)ab, Luo Yi (罗毅)b   

  1. a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China; b Theoretical Chemistry, Royal Institute of Technology, AlbaNova, S-10691 Stockholm, Sweden
  • Received:2005-04-22 Revised:2005-07-14 Online:2005-10-20 Published:2005-10-20
  • Supported by:
    Project supported by the Shandong Natural Science Foundation (Grant No Y2004A08), the University Doctoral Subject Special Science and Technology Foundation (Grant No 20040445001)and The Key Laboratory for High Intensity Optics of Shanghai Institute of Opt

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摘要： We have investigated the resonant propagation of femtosecond laser pulse in 4-trans-[p-(N, N-Di-n-butylamino)-p-stilbenyl vinyl] pyridine medium with permanent dipole moments. The electronic structures and parameters for the compound have been calculated by using density functional theory. In the optical regime, there is one charge-transfer state, and the molecule can thus be simplified as a two-level system. Both the one- and two-photon transitions occur between the ground and charge-transfer states. The numerical results show that the permanent dipole moments have an obvious effect on the propagation of the ultrashort pulse laser. The ideal self-induced transparency disappears for 2$\pi$ pulse, and second harmonic spectral components occur significantly due to the two-photon absorption process. For the 6\pi pulse, continuum frequency generation is produced and a shorter duration pulse in time domain with 465 as is obtained.

关键词: Maxwell--Bloch equations, Rabi flopping, two-photon absorption

Abstract: We have investigated the resonant propagation of femtosecond laser pulse in 4-trans-[p-(N, N-Di-n-butylamino)-p-stilbenyl vinyl] pyridine medium with permanent dipole moments. The electronic structures and parameters for the compound have been calculated by using density functional theory. In the optical regime, there is one charge-transfer state, and the molecule can thus be simplified as a two-level system. Both the one- and two-photon transitions occur between the ground and charge-transfer states. The numerical results show that the permanent dipole moments have an obvious effect on the propagation of the ultrashort pulse laser. The ideal self-induced transparency disappears for 2$\pi$ pulse, and second harmonic spectral components occur significantly due to the two-photon absorption process. For the 6$\pi$ pulse, continuum frequency generation is produced and a shorter duration pulse in time domain with 465 as is obtained.

Key words: Maxwell--Bloch equations, Rabi flopping, two-photon absorption

中图分类号:  (Photon interactions with molecules)

  • 33.80.-b
42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 33.15.Kr (Electric and magnetic moments (and derivatives), polarizability, and magnetic susceptibility)