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Ultrafast laser excitation and rotational de-excitation of cis-stilbene Yusheng Doua,b,
 

Summary: 1
Ultrafast laser excitation and rotational de-excitation of cis-stilbene
Yusheng Doua,b,
*, Weifeng Wua,
, Hong Tanga
, and Roland E. Allenc
a
Bio-Informatics Institute, Chongqing University of Posts and Telecommunications,
Chongqing, 400065, P. R. China
b
Department of Physical Sciences, Nicholls State University, PO Box 2022, Thibodaux,
LA 70310, U. S. A.
c
Department of Physics, Texas A&M University, College Station, Texas 77843, U. S. A.
ABSTRACT
A realistic dynamical simulation is reported for ultrafast laser excitation and rotational
de-excitation of cis-stilbene. Upon irradiation by a laser pulse with a FWHM of 100 fs,
the molecule first rotates around its vinyl bond to about 90, where an avoided crossing
leads to electronic de-excitation. The molecule then immediately twists back to about
- 60 within only about 80 fs, avoiding isomerization. The other principal dihedral angles,

  

Source: Allen, Roland E. - Department of Physics and Astronomy, Texas A&M University

 

Collections: Physics