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Communication Dans Un Congrès Année : 1993

Near field scattered by subsurface particles

Résumé

A volume integral method is developped in order to study the scattering of a plane wave by a small particle placed below a metallic surface. The scattering patterns produced in the near field are analysed. For p-polarization, a plasmon is excited producing interferences along the surface. It is shown that this interference pattern might be used to measure the dielectric constant of the metal. The scattered field has a pronounced maxima for p-polarization if the particle is close to the interface. This effect is due to a resonant interaction between the surface and the dipole already identified in the context of SERS as an image enhancement effect. Finally, the resolution of a near field detection of a subsurface scatterer is discussed on the basis of the transverse extension of the scattered field.
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Dates et versions

hal-01656969 , version 1 (06-12-2017)

Identifiants

  • HAL Id : hal-01656969 , version 1

Citer

F. Pincemin, A Sentenac, J.-J Greffet. Near field scattered by subsurface particles. Proceedings of the NATO Advanced Research Workshop, Oct 1992, Arc-et -Senans, France. pp. 209-220. ⟨hal-01656969⟩
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