Angular redistribution

In this section, basic equations necessary for understanding photoinduced modification of Xi/kl tensor are given. The contributions of angular hole burning (AHB) and angular redistribution (AR) mechanisms are described. 

Another mechanism responsible for the optically induced anisotropy is angular redistribution (AR) of molecules. This mechanism has been widely developed to explain photoinduced birefringence and dichroism. In most experimental cases, there is evidence of some rotation of molecules during the photoisomerization cycle (see Reference 2, for example). This rotation results in AR, because the molecules remain longer in states with lower excitation probability, and so more molecules are accumulated perpendicular to the pump polarization. The AR process is initiated by the AHB, and these two processes should be studied simultaneously in the framework of general... 

The angular redistribution of light during a scattering event is described by the scattering phase function, P(0). This gives the probability that a photon from... 

---