中国物理B ›› 2006, Vol. 15 ›› Issue (10): 2338-2342.doi: 10.1088/1009-1963/15/10/024

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Carrier--envelope phase effects for a dipolar molecule interacting with ultrashort laser pulse

赵　珂, 李洪玉, 刘纪彩, 王传奎   

  1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
  • 收稿日期:2005-07-06 修回日期:2006-03-30 出版日期:2006-10-20 发布日期:2006-10-20
  • 基金资助:
    Project supported by the Shandong Natural Science Foundation (Grant No Y2004A08), University Doctoral Subject Special Science and Technology Foundation (Grant No 20040445001) and the Key Laboratory for High Intensity Optics of Shanghai Institute of Opti

Carrier--envelope phase effects for a dipolar molecule interacting with ultrashort laser pulse

Zhao Ke(赵珂), Li Hong-Yu(李洪玉), Liu Ji-Cai(刘纪彩), and Wang Chuan-Kui(王传奎)†   

  1. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China
  • Received:2005-07-06 Revised:2006-03-30 Online:2006-10-20 Published:2006-10-20
  • Supported by:
    Project supported by the Shandong Natural Science Foundation (Grant No Y2004A08), University Doctoral Subject Special Science and Technology Foundation (Grant No 20040445001) and the Key Laboratory for High Intensity Optics of Shanghai Institute of Opti

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摘要： In this paper the phase-dependent features of ultrashort laser pulse resonant propagation in a two-level dipolar molecule are demonstrated by solving full Maxwell--Bloch equations. The electronic properties of dipolar molecule 4-trans-[p-(N, N-Di-n-butylamino)-p -stilbenylvinyl] pyridine (DBASVP) molecule, one-dimensional asymmetric organic molecule, is calculated by density functional theory at \textit{ab initio} level. The numerical results show that the carrier propagation and the spectrum evolution of the pulse are sensitive to its initial phase and the phase sensitivity is more obvious for larger area pulse. The phase-dependent feature is more evident in dipolar molecule because the permanent dipole moment makes the nonlinear effects stronger.

关键词: carrier--envelope phase, self-phase modulation, Maxwell--Bloch equations

Abstract: In this paper the phase-dependent features of ultrashort laser pulse resonant propagation in a two-level dipolar molecule are demonstrated by solving full Maxwell--Bloch equations. The electronic properties of dipolar molecule 4-trans-[p-(N, N-Di-n-butylamino)-p -stilbenylvinyl] pyridine (DBASVP) molecule, one-dimensional asymmetric organic molecule, is calculated by density functional theory at ab initio level. The numerical results show that the carrier propagation and the spectrum evolution of the pulse are sensitive to its initial phase and the phase sensitivity is more obvious for larger area pulse. The phase-dependent feature is more evident in dipolar molecule because the permanent dipole moment makes the nonlinear effects stronger.

Key words: carrier--envelope phase, self-phase modulation, Maxwell--Bloch equations

中图分类号:  (Beam characteristics: profile, intensity, and power; spatial pattern formation)

  • 42.60.Jf
03.50.De (Classical electromagnetism, Maxwell equations) 42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)