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Plasmon de surface de particules métalliques toroïdales

Abstract : This thesis deals with the optical properties of small metal torii. A method of resolution of the equation of Laplace in toroidal coordinates is introduced and the radiative properties of the metal toric nanoparticules are studied within the electrostatic framework. The study on the eigenmodes spatial distribution suggests that metal nanotorus can carry a non-zero magnetic dipole moment at optical frequencies. Analytical expressions for the extinction and scattering cross sections of the torus are also found and compared with numerical simulations and experimental results obtained with collaborations. The sensitivity of the plasmon frequency to the refraction index of the external medium and to the form factor is highlighted.
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Contributor : Alexandre Mary <>
Submitted on : Monday, January 22, 2007 - 5:13:27 PM
Last modification on : Friday, June 8, 2018 - 2:50:07 PM
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  • HAL Id : tel-00125844, version 1


Alexandre Mary. Plasmon de surface de particules métalliques toroïdales. Physique mathématique [math-ph]. Université de Bourgogne, 2006. Français. ⟨tel-00125844⟩



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