Investigations of laser interaction with metal (gold) nanoparticles is of a great interest for laser applications in nanotechnology, engineering, and medicine. The first problem of laser interaction is to determine the optical properties of metal nanoparticles, that determines following photophysical and photochemical processes. The calculation of efficiency factors of absorption, scattering and extinction for spherical gold nanoparticles with radiuses in the range 5-100 nm and for some laser wavelengths is performed. The estimation of absorbed laser radiation energy by gold nanoparticles, their maximal temperatures and comparison with experimental data is made. The importance of the use of correct values of optical parameters of nanoparticles is demonstrated. Absorption efficiency factor K abs versus the radius r0 of the spherical Au nanoparticle embedded in water
Processes of laser interaction with metal (gold) nanoparticles are of great interest for laser applications in nanotechnology, engineering, and medicine. Optical properties of nanoparticles determine photophysical and photochemical processes during laser treatment. Computer calculation of efficiency factors of absorption, scattering and extinction of radiation by ellipsoidal gold nanoparticles (two-dimensional ellipsoids of revolution) with small semiaxes in the range 5-100 nm, for some values of aspect ratio and angle of orientation of ellipsoid with respect to direction of laser radiation propagation and for some laser wavelengths is performed. The estimation of absorbed and scattered laser radiation energy by gold ellipsoidal nanoparticles, their maximal temperatures and comparison with experimental data is made. Efficiency factor of absorption for the prolate Au ellipsoid embedded into water versus the ellipsoid small semiaxis r b
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