Modeling Multipole Dielectric Spherical Nanoantenna for Optical and THz Range

摘要

The paper gives the result of a numerical calculation of the Maxwell equation by the finite element method for a dielectric particle of spherical shape in the optical and THz ranges with a size 0.375÷0.75 of wavelength. The nature of the electric field distribution inside the sphere is shown in the case of high-order resonance for the optical range. The idea was put forward to use the resonance feature of the dielectric sphere to amplify the current in the conductor whip antenna. It is shown, that the use of such an antenna makes it possible to achieve amplification in the conductor up to 30 dB.