Degenerate two-wave mixing via a dynamic grating in Fe3O4nanoparticle suspensions
| Autor: | L V Zagrebin, Rudol'f V Litvinov, E. Yu. Ageev, S S Shestov, N D Khat'kov |
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| Rok vydání: | 2009 |
| Předmět: |
Permittivity
Materials science business.industry Physics::Optics Nonlinear optics Nanoparticle Statistical and Nonlinear Physics Dielectric Grating Molecular physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Suspension (chemistry) Colloid Optics Electrical and Electronic Engineering business Mixing (physics) |
| Zdroj: | Quantum Electronics. 39:435-441 |
| ISSN: | 1468-4799 1063-7818 |
| DOI: | 10.1070/qe2009v039n05abeh013928 |
| Popis: | Optical-gradient-force-induced spatially inhomogeneous disturbances of the dielectric permittivity of a suspension of spherical nanoparticles are analysed in the Maxwell Garnett approximation. Degenerate two-wave mixing in such media is shown to cause the formation of a spatial nanoparticle grating and the associated permittivity grating in the colloid. Relations are derived for the complex coupling constant of the waves. Codirectional and contradirectional two-wave mixing in suspensions of light-absorbing nanoparticles is considered. The two-beam coupling gain at 640 nm in various suspensions of Fe3O4 nanoparticles may reach ~10 cm-1. |
| Databáze: | OpenAIRE |
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