With the virtue of its symmetry selectivity optical second harmonic generation(SHG)is particularly attractive for probing the ferroelectric *** second-order nonlinear optical polarization is given by P(2ω)=ω(2)E2(ω...
With the virtue of its symmetry selectivity optical second harmonic generation(SHG)is particularly attractive for probing the ferroelectric *** second-order nonlinear optical polarization is given by P(2ω)=ω(2)E2(ω)with electric fields E(ω)of the incident light *** the second-order susceptibilityω(2)ω0 for noncentrosymmetric systems only,SHG effect directly couples to the symmetry-breaking ferroelectric order ***,under the external stimuli conditions
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