Highly Tunable Dielectric Nano Antenna Consisting Chain of Silicon Particles by Dipole Emitter

Abstract

The study of a highly tunable dielectric nano antennas consisting of a chain of silicon nanoparticles excited by a quantum emitter was made. This allowed radiation properties tuned through hole plasma photo excitation. The tuning of radiation power patterns and the Purcell effect by pumping of boundary nanoparticles with relatively low peak intensities were demonstrated. This was also found that these effects were valid for the nano antenna situated on a dielectric surface. It was found that nano antennas were allowed for the tunable unidirectional lending of surface plasmon waves. The high index dielectric nanostructures for nonlinear nano photonics was produced due to their strong nonlinear response. The modification of the spontaneous emission rate of a quantum emitter induced by its environment was not so pronounced for single dielectric nanoparticles. This was due to low quality factor and large mode volumes which produced low efficiency of the light matter interaction. This was removed by relying on slowly guided modes in chain nanostructures. The Van Hove singularities associated with infinite structures in the high Purcell factor was enhanced due to use of eigen mode analysis. These modes made the structure very sensitive to any change in geometrical shape which created highly tunable devices. The combination of Van Hove singularity and electron-hole plasmon excitation produced a highly tunable dielectric nanoantennas, consisting of a silicon nanoparticles chain excited by and electric dipole emitters. The obtained results were found in good agreement with previously obtained results.