Abstract

Fourth order Raman effect is one of the even order nonlinear optical effects, which is the phenomenon to observe even-order nonlinear susceptibility χ⁽ⁿ⁾ when polarization of molecular is distorted nonlinearly with a strong laser light. This effect has a selectivity of non-centrosymmetric structure because χ⁽²⁾ become zero with centrosymmetric structure. Fourth order Raman effect has been used for an interfacial study because molecular in interface is non centrosymmetric.

© 2014 Japan Society of Applied Physics, Optical Society of America