Femtosecond chirped pulse excitation of vibrational wave packets in LD690 and bacteriorhodopsin

被引:148
作者
Bardeen, CJ
Wang, Q
Shank, CV [1 ]
机构
[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
关键词
D O I
10.1021/jp980346k
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Chirped femtosecond pulses are used to selectively excite vibrationally coherent wave packets in the ground and excited states of molecules in solution. Femtosecond chirped pump/transform-limited probe experiments on both nonreactive and reactive systems (LD690 and bacteriorhodopsin) are presented, showing that slight pulse chirps can lead to large differences in the observed amplitudes and damping times of the wave packet oscillations. By comparing the experimental data with numerical simulations based on multimode harmonic oscillator models for the molecular potential energy surfaces, we conclude that positively chirped pulses discriminate against the formation of an oscillatory ground-state component via impulsive stimulated Raman scattering, while negatively chirped pulses enhance this process. The ability to separate the relative contributions of either the ground- or excited-state vibrational coherence to the transient absorption signal by slightly modifying the phase structure of the excitation pulse enables us to obtain state-specific information about the vibrational dephasing.
引用
收藏
页码:2759 / 2766
页数:8
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共 43 条
  • [11] GENERATION OF 0.6 MU-J PULSES OF 16 FS DURATION THROUGH HIGH-REPETITION RATE AMPLIFICATION OF SELF-PHASE MODULATED PULSES
    BOYER, G
    FRANCO, M
    CHAMBARET, JP
    MIGUS, A
    ANTONETTI, A
    GEORGES, P
    SALIN, F
    BRUN, A
    [J]. APPLIED PHYSICS LETTERS, 1988, 53 (10) : 823 - 825
  • [12] High-power femtosecond chirped pulse excitation of molecules in solution
    Cerullo, G
    Bardeen, CJ
    Wang, Q
    Shank, CV
    [J]. CHEMICAL PHYSICS LETTERS, 1996, 262 (3-4) : 362 - 368
  • [13] FEMTOSECOND IMPULSIVE EXCITATION OF NONSTATIONARY VIBRATIONAL-STATES IN BACTERIORHODOPSIN
    DEXHEIMER, SL
    WANG, Q
    PETEANU, LA
    POLLARD, WT
    MATHIES, RA
    SHANK, CV
    [J]. CHEMICAL PHYSICS LETTERS, 1992, 188 (1-2) : 61 - 66
  • [14] High-resolution acousto-optic shaping of unamplified and amplified femtosecond laser pulses
    Dugan, MA
    Tull, JX
    Warren, WS
    [J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1997, 14 (09) : 2348 - 2358
  • [15] 2-PHOTON WAVE-PACKET INTERFEROMETRY
    ENGEL, V
    METIU, H
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (08) : 5448 - 5458
  • [16] FEMTOSECOND PULSE PHASE MEASUREMENT BY SPECTRALLY RESOLVED UP-CONVERSION - APPLICATION TO CONTINUUM COMPRESSION
    FOING, JP
    LIKFORMAN, JP
    JOFFRE, M
    MIGUS, A
    [J]. IEEE JOURNAL OF QUANTUM ELECTRONICS, 1992, 28 (10) : 2285 - 2290
  • [17] COMPRESSION OF OPTICAL PULSES TO 6 FEMTOSECONDS BY USING CUBIC PHASE COMPENSATION
    FORK, RL
    CRUZ, CHB
    BECKER, PC
    SHANK, CV
    [J]. OPTICS LETTERS, 1987, 12 (07) : 483 - 485
  • [18] EVOLUTION OF THE VIBRONIC ABSORPTION-SPECTRUM IN A MOLECULE FOLLOWING IMPULSIVE EXCITATION WITH A 6 FS OPTICAL PULSE
    FRAGNITO, HL
    BIGOT, JY
    BECKER, PC
    SHANK, CV
    [J]. CHEMICAL PHYSICS LETTERS, 1989, 160 (02) : 101 - 104
  • [19] Can chirp enhance cumulative pre-resonant impulsive stimulated Raman excitation?
    Hiller, EM
    Cina, JA
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (09) : 3419 - 3430
  • [20] VIBRATIONAL-STATE SHAPING FOR SELECTIVE LASER CHEMISTRY
    JANSZKY, J
    ADAM, P
    VINOGRADOV, AV
    KOBAYASHI, T
    [J]. CHEMICAL PHYSICS LETTERS, 1993, 213 (3-4) : 368 - 372