Second-harmonic generation in graded metal–dielectric films of anisotropic particles
نویسندگان
چکیده
We investigate theoretically the effective second-harmonic generation (SHG) susceptibility in graded films of metal–dielectric random composites with anisotropically shaped particles by invoking the local field effects. Using numerical examples, we demonstrate that in the presence of gradation profiles and/or shape effects, graded metal–dielectric films could be used as novel optical materials for producing a broad structure in both the linear and nonlinear (SHG) response and with an enhancement in the nonlinear response. 2005 Elsevier B.V. All rights reserved. PACS: 42.65.-k; 77.22.Ej; 42.79.Ry; 77.84.Lf
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