Dichroism and Optical Rotation—Rigorous Discussion

Circular Dichroism and Optical Rotation— Rigorous Discussion 

We now derive expressions for the circular dichroism and optical rotation that occur when a PNC-induced 1 transition between two states interferes with an M1 transition between the same two states. 

A circularly polarized electromagnetic wave traveling in the z direction has electric and magnetic field vectors  

Similarly, in the case of absorption, the absorptivity K will change between right and left circularly polarized light by a fractional amount 2S, where 

5 is called the circular dichroism, and we have assumed K K+ — K-, implying 5 1. 

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