Enhancement of Optical Nonlinearity Through Anisotropic Microstructures

Details Enhancement of Optical Nonlinearity Through Anisotropic Microstructures Enhancement of Optical Nonlinearity Through Anisotropic Microstructures

1997-11-18

arxiv.org/abs/cond-mat/9711166v1

Optics Communications 148, 197 (1998)

Physics

Condensed Matter

Soft Condensed Matter

12 pages, LaTeX format, 9 figures, preliminary results were Reported in the 2nd Tohwa University International Meeting on Stat

Scientific paper

10.1016/S0030-4018(97)00665-2 10

We investigate the polarization dependence of optical nonlinearity enhancement for a uniaxial anisotropic composite of metal nanocrystals in a dielectric host. Three cases are distinguished depending on whether the polarization is parallel, perpendicular or unpolarized with respect to the axis of anisotropy. For the parallel polarization, the results show that the 3D results are qualitatively similar to the 2D case reported recently. For the perpendicular polarization, the results are markedly different from the parallel counterpart: In contrast to the absorption, the enhancement factor actually increases with the anisotropy. Thus the separation of the absorption and enhancement peaks becomes even more pronounced than the parallel polarization case. These results indicate a strong polarization dependence of the nonlinear optical response.

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