Investigation of Radiation Properties of Nanoparticles by Analytical-Numerical Approach

The application of three different methods is proposed for study of the radiation properties of nanoparticles in the range of light waves. The total electromagnetic (EM) field is presented in terms of Debay potentials when the generalized method of eigenoscillations (GMEO) is used; the explicit formulas for electrical component of the EM field are derived when the asymptotic approach is used; and the numerical scheme of the second order of exactness is used for determination of the components of EM field when the finite-domain time-domain (FDTD) method is involved. The recipes how to calculate the radiations characteristics of nanoparticles are presented. The effectiveness of methods is demonstrated at the different stages of solving the existing diffraction problems. The computational data confirm the ability of the proposed methods to solve the diffraction problems with a high degree of accuracy.