Giant nonlinear optical activity in an aggregated silver nanocomposite |
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| Authors: | V. P. Drachev S. V. Perminov S. G. Rautian V. P. Safonov |
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| Affiliation: | (1) Institute of Semiconductor Physics Siberian Branch of the, Russian Academy of Sciences, 630090 Novosibirsk, Russia;(2) Institute of Automation and Electrometry Siberian Branch of the, Russian Academy of Sciences, 630090 Novosibirsk, Russia |
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| Abstract: | Nonlinear optical activity due to spatial dispersion is observed in a colloidal solution of silver. It is shown experimentally that the effect is substantially enhanced (by a factor of ∼102) when the silver particles aggregate into fractal clusters. The self-rotation angle of the plane of polarization is 2 mrad at an intensity of 2 MW/cm2 for λ=0.532 μm and a pulse duration of 11 ns. A method of separating the contributions of the local and nonlocal effects to the rotation of the plane of polarization is proposed and implemented. Pis’ma Zh. éksp. Teor. Fiz. 68, No. 8, 618–622 (25 October 1998) |
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