WAVE-PACKET MODEL FOR EXCITATION BY ULTRASHORT PULSES

被引:51
作者
SUOMINEN, KA
GARRAWAY, BM
STENHOLM, S
机构
[1] University of Helsinki, Research Institute for Theoretical Physics, 00170 Helsinki
来源
PHYSICAL REVIEW A | 1992年 / 45卷 / 05期
关键词
D O I
10.1103/PhysRevA.45.3060
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
In this paper we discuss the excitation of a localized molecular ground-state wave function by a short laser pulse. With a one-dimensional approach we show when it is possible to excite a considerable fraction of the ground state without too much distortion of the shape of the wave packet. This is of interest in time-resolved molecular experiments where an excited wave packet is often taken as the initial state. We solve the two coupled wave equations numerically and compare results to an analytical approximation based on the Rosen-Zener model. The validity of the approximation and its breakdown is considered in detail. Special attention is paid to the effect of lengthening the pulse duration and the consequences of the accompanying number of Rabi flops occurring in the area theorem. When the approximation breaks down, the wave packet becomes distorted and spread out, but there are still interesting coherence effects due to the interplay between the Rabi flopping and the molecular dynamics; these are displayed and discussed. Finally, the relationship to other works and possible generalizations are presented.
引用
收藏
页码:3060 / 3070
页数:11
相关论文
共 31 条
  • [1] Allen L., 1987, WILEYINTERSCIENCE PU, V28
  • [2] ANALYTIC SOLUTIONS TO THE 2-STATE PROBLEM FOR A CLASS OF COUPLING POTENTIALS
    BAMBINI, A
    BERMAN, PR
    [J]. PHYSICAL REVIEW A, 1981, 23 (05): : 2496 - 2501
  • [3] TRANSITION-PROBABILITY OF A 2-LEVEL ATOM INTERACTING WITH A TIME-SYMMETRIC PULSE
    BAMBINI, A
    LINDBERG, M
    [J]. PHYSICAL REVIEW A, 1984, 30 (02): : 794 - 802
  • [4] ANALYTIC SOLUTION OF THE 2-STATE PROBLEM
    CARROLL, CE
    HIOE, FT
    [J]. PHYSICAL REVIEW A, 1990, 41 (05): : 2835 - 2836
  • [5] Demkov Y N., 1969, VESTN LENINGR U FIZ, V16, P39
  • [6] SOLUTION OF THE SCHRODINGER-EQUATION BY A SPECTRAL METHOD
    FEIT, MD
    FLECK, JA
    STEIGER, A
    [J]. JOURNAL OF COMPUTATIONAL PHYSICS, 1982, 47 (03) : 412 - 433
  • [7] TIME-DEPENDENT PROPAGATION OF HIGH-ENERGY LASER-BEAMS THROUGH ATMOSPHERE
    FLECK, JA
    MORRIS, JR
    FEIT, MD
    [J]. APPLIED PHYSICS, 1976, 10 (02): : 129 - 160
  • [8] WAVE PACKET DESCRIPTION OF LASER-INDUCED LEVEL-CROSSINGS
    GARRAWAY, BM
    STENHOLM, S
    [J]. OPTICS COMMUNICATIONS, 1991, 83 (5-6) : 349 - 357
  • [9] GARRAWAY BM, 1991, LIGHT INDUCED KINETI, P129
  • [10] ULTRAFAST REACTION DYNAMICS
    GRUEBELE, M
    ZEWAIL, AH
    [J]. PHYSICS TODAY, 1990, 43 (05) : 24 - 33