Scattering optimization of photonic cluster: from minimal to maximal reflectivity

The optimization of the light scattered by photonic cluster made of small particles is studied with the help of the local perturbation method and special optimization algorithm. It was shown that photonic cluster can be optimized in a such a way that its reflectivity will be increased or decreased by several orders of magnitude for selected wavelength and direction.Comment: 12 pages, 5 figure

Resonance scattering of light by spherical photonic clusters: analytical approach

Scattering of light by the photonic clusters made of small particles is studied with the help of the quasiperiodicity condition and the local perturbation method. The analytical expression for the field scattered by the cluster is presented and the conditions of resonance scattering are found. The conditions of the zero scattering by the cluster are also found.Comment: 11 page

Periodicity enclosed in boundaries: local density of states in photonic clusters\ud

We have studied the effect of the boundaries on the local density of states (LDOS) in one-, two-, and three-dimensional finite size photonic structures. The LDOS was calculated with the help of the local perturbation method (LPM) and a new LPM-Bloch method using periodicity of the system. The methods are applicable for the clusters made of small (relative to the incident wavelength) particles or for the clusters which can be considered as made of such particles. It was demonstrated that the LPM-Bloch method is an accurate numerical tool for calculation of the LDOS in the finite size photonic structures with weak interference. \ud \u

Wave scattering by objects made of small particles with pulsating permittivity

In this work we study the wave scattering by small dispersionless particles with pulsating refractive index. The scattered fields and their resonance frequencies are calculated by using scalar approximation and exponentially time-dependent permittivity. In addition, the scattering by single sphere with the pulsating permittivity is calculated numerically for different regimes of the pulsations. Our results suggest that the pulsations of the refractive index of the scatterer significantly affect the scattered field: existing resonances shift, additional resonances emerge, and deeps in the light scattering spectrum appear

The local density of states in finite size photonic structures, small particles approach

The local density of states is studied with the help of the local perturbation method for vector and scalar wave fields propagating in finite size photonic structures. The local density of states is numerically calculated for one-, two-, and three-dimensional finite size photonic structures considering them as made of small particles.\ud \u