Picosecond pulse induced transient molecular birefringence and dichroism

摘要: Excitation of dye molecules in fluid solution can lead to transient birefringence (caused by change the polarizability anisotropy) and dichroism absorption cross section). In anisotropic method Shank Ippen, both effects are observed, some cases measured signal is dominated contribution. Very small amounts external erroneous values for rotational reorientation time. We present an analysis these a Jones matrix formalism, use results show how obtain correct times. The changes anisotropy dyes oxazine‐725 DODCI evaluated as +75 +4 A3, respectively, at 585 nm we believe be first direct measurements this between ground singlet states. times four ethanol presented compared with hydrodynamic predictions.