Theory of Second-Harmonic Generation in Colloidal Crystals
نویسندگان
چکیده
On the basis of the Ewald-Kornfeld formulation, we study the effective susceptibility of second-harmonic generation (SHG) in colloidal crystals, which are made of graded metallodielectric nanoparticles with an intrinsic SHG susceptibility suspended in a host liquid. We find a large enhancement and redshift of SHG responses, which arises from the periodic structure, local field effects, and gradation in the metallic cores. The optimization of the Ewald-Kornfeld formulation is also investigated.
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