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Volumn 266, Issue 5184, 1994, Pages 422-424

Vibrationally coherent photochemistry in the femtosecond primary event of vision

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRON ENERGY LEVELS; ISOMERIZATION; LIGHT ABSORPTION; MOLECULAR VIBRATIONS; RAMAN SCATTERING; ULTRAFAST PHENOMENA; VISION;

EID: 0028519152     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.7939680     Document Type: Article
Times cited : (612)

References (26)
  • 5
    • 84901966597 scopus 로고    scopus 로고
    • note
    • Vibrational coherence refers to a collective coherence among an ensemble of molecules and is a consequence of optical excitation on a time scale faster than the motion of interest. A short optical pulse also excites a manifold of quantized vibrational levels in a single molecule. These vibrational levels are coherent because they have specific phase and amplitude relations and therefore constitute a nonstationary vibrational state or wave packet that describes the nuclear motion. The vibrational coherence resulting from impulsive excitation reflects the nonstationary wave packet dynamics of individual molecules. Under continuous-wave excitation, vibrational coherence is not initiated in the ensemble. Nevertheless, the nonstationary wave packet dynamics of individual rhodopsin molecules are identical to that indicated by the femtosecond experiments.
  • 10
  • 11
    • 0343167102 scopus 로고
    • _, J. Phys. Chem. 97, 12427 (1993).
    • (1993) J. Phys. Chem. , vol.97 , pp. 12427
  • 18
    • 0017251977 scopus 로고
    • A. Warshel, Nature 260, 679 (1976).
    • (1976) Nature , vol.260 , pp. 679
    • Warshel, A.1
  • 26
    • 84901966599 scopus 로고    scopus 로고
    • note
    • We thank Continuum Corporation for loaning us the MACH 500 YAG laser used for some of this work and S. J. Rosenthal for helpful discussions. This research was supported by Department of Energy contract DE-AC03-76SF00098 (C.V.S.), National Institutes of Health grant EY-02051 (R.A.M.), and National Science Foundation grant CHE 91-20254 (R.A.M.).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.