The polarization nonlinearity, caused by both local and nonlocal response, was examined in Ag fractal clusters. The enhancement coefficients were measured for inverse Faraday effect (IFE) and nonlinear optical activity. Unlike IFE, the nonlinear optical activity of the colloidal solution, caused by the spatial dispersion of nonlinear response, was found to be strongly sensitive to aggregation. The constant of self-induced rotation of the polarization plane in aggregated colloid was about 1.3·102 rad·cm/MW for 11-ns laser pulses at λ = 0.532 μm, while ≈1.6·104 rad·cm/MW was obtained for the non-aggregated one. Thus, the enhancement factor of nonlinear gyrotropy due to aggregation of colloid reached ≈80.
|Number of pages||1|
|Publication status||Published - 1999|
|Event||Proceedings of the 1999 Quantum Electronics and Laser Science Conference (QELS '99) - Baltimore, MD, USA|
Duration: 23 May 1999 → 28 May 1999
|Conference||Proceedings of the 1999 Quantum Electronics and Laser Science Conference (QELS '99)|
|City||Baltimore, MD, USA|
|Period||23/05/99 → 28/05/99|