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oe1(光电查) - 科学论文

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?? 中文（中国） ▾

  • Coupled Plasmon Oscillations in a Cluster Consisting of Three Silver Nanocylinders with Different Diameters

    摘要： 2D problem of the diffraction of the TM plane electromagnetic wave by a cluster consisting of three self-similar silver nanocylinders with different sizes is considered. Rigorous numerical procedures are used to study quasi-static plasmon resonances in such a cluster. Frequency characteristics of the scattering cross section and spatial structure of the field in the vicinity of the cylinders are calculated for different angles of incidence of the plane wave, self-similarity coefficients, and diameters of cylinders. It is shown that an increase in the distance between the cylinders is accompanied by degeneration of the resonances of scattering cross section. When real loss of silver is taken into account, electric field at the exit of the cluster cannot be amplified by a factor of greater than 10.

    关键词： plasmon resonances,electric field amplification,diffraction,silver nanocylinders,TM plane electromagnetic wave,scattering cross section

    更新于2025-09-11 14:15:04

  • Scattering of a Plane Electromagnetic Wave by a Multilayer Spherical Lens

    摘要： We propose an analytical solution of the problem of diffraction of a plane electromagnetic wave by a multilayer dielectric (including plasmon) sphere. The solution is obtained using the method of separation of variables. New efficient recurrence relationships are obtained for calculations of the fields in layers, as well as formulas for the fields in the near and far diffraction zones. The novelty of the proposed solution is connected with the way of representing its radial part in the form of normalized functions. It is shown that as the number of the lens layers, which approximate the smooth profile of dielectric permittivity, grows, the electric field at the focusing point increases and reaches the maximum value. This allows one to determine the minimum required number of layers in practical problems. Resonance properties of metal-dielectric nanoparticles are studied in the optical band.

    关键词： diffraction,multilayer dielectric sphere,plane electromagnetic wave,separation of variables,optical band,metal-dielectric nanoparticles,resonance properties,recurrence relationships,focusing point

    更新于2025-09-10 09:29:36