| Resonant propagation of femtosecond laser pulse in DBASVP molecule：one-dimensional asymmetric organic molecule |
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| 引用本文： | 赵珂,刘纪彩,王传奎,罗毅. Resonant propagation of femtosecond laser pulse in DBASVP molecule：one-dimensional asymmetric organic molecule[J]. 中国物理, 2005, 14(10): 2014-2018 |
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| 作者姓名： | 赵珂 刘纪彩 王传奎 罗毅 |
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| 作者单位： | College of Physics and Electronics, Shandong Normal University,Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,Jinan 250014, China;College of Physics and Electronics, Shandong Normal University,Jinan 250014, China;Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden;Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden |
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| 基金项目： | 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 Optics and Fine Mechanics,Chinese Academy of Sciences. |
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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 2π pulse, and second harmonic spectral components occur significantly due to the two-photon absorption process. For the 6π pulse, continuum frequency generation is produced and a shorter duration pulse in time domain with 465 as is obtained.
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| 关 键 词： | 激光脉冲 Maxwell-Bloch方程 Rabi贬调 两相吸收 电磁传播 |
| 收稿时间： | 2005-04-22 |
| 修稿时间： | 2005-04-222005-07-14 |
Resonant propagation of femtosecond laser pulse in DBASVP molecule:one-dimensional asymmetric organic molecule |
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| Zhao Ke,Liu Ji-Cai,Wang Chuan-Kui and Luo Yi. Resonant propagation of femtosecond laser pulse in DBASVP molecule:one-dimensional asymmetric organic molecule[J]. Chinese Physics, 2005, 14(10): 2014-2018 |
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| Authors: | Zhao Ke Liu Ji-Cai Wang Chuan-Kui Luo Yi |
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| Affiliation: | College of Physics and Electronics, Shandong Normal University,Jinan 250014, China; College of Physics and Electronics, Shandong Normal University,Jinan 250014, China;Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden; Theoretical Chemistry, Royal Institute of Technology, AlbaNova,S-10691 Stockholm, Sweden |
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| 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 6pi pulse, continuum frequency generation is produced and a shorter duration pulse in time domain with 465 as is obtained. |
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| Keywords: | Maxwell--Bloch equations Rabi flopping two-photon absorption |
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