Nonlinear Optical Responses of Strongly Correlated Electronic Systems
Two kinds of nonlinear optical responses, i.e., second harmonic generation (SHG) and third-order susceptibility (two-photon absorption) of strongly correlated electronic systems are presented. We clarify the microscopic mechanism of SHG due to electric and magnetic dipole moments and their interference in antiferromagnets. The third-order optical signals including two-photon absorption are theoretically shown to be enhanced by strong correlation among elementary excitations.
KeywordsSecond Harmonic Generation Magnetic Dipole Moment Cross Relaxation Correlate Electronic System Crystalline Field
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- F.C. Zhang and T.M. Rice, Phys. Rev.B37, 3759 (198).Google Scholar