Excitation localization and nonlinear optical processes in colloidal silver aggregates
| Autor: | S. G. Rautian, N.N. Lepeshkin, Yu.E. Danilova, V. P. Safonov |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Statistics and Probability
endocrine system Nonlinear absorption Materials science genetic structures digestive oral and skin physiology Physics::Optics Nanotechnology Colloidal silver Condensed Matter Physics complex mixtures Metal colloids eye diseases Condensed Matter::Soft Condensed Matter Nonlinear optical Colloid Fractal Chemical physics Local field Excitation |
| Zdroj: | Physica A: Statistical Mechanics and its Applications. 241:231-235 |
| ISSN: | 0378-4371 |
| DOI: | 10.1016/s0378-4371(97)00088-5 |
| Popis: | We present the results on investigation of the photomodification and optical nonlinearities of colloidal aggregates, which are indicative of the localization of optical excitation in fractal clusters. It is shown experimentally that the enhanced optical nonlinearity of aggregated metal colloids is connected with an enhancement of the local field in resonant domains of large clusters. The enhancement factor of nonlinear absorption in aggregated silver colloids is about 700 as compared with nonaggregated samples. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect