Optical resonances of dielectric and semiconductor nanoparticles for planar photonics and metasurfaces

• Applicant: Dr. Andrey Evlyukhin
• Subject Area: Theoretical Condensed Matter Physics ; Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
• Term: from 2016 to 2018
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 313688289

The project is devoted to detailed theoretical and numerical investigations of the optical properties of arbitrarily shaped high refractive index dielectric nanoparticles and complex nanostructures composed from them. These particles and particle structures support strong resonant optical response and have huge potential for the realization of multi-functional metasurfaces and novel integrated optical components. The influences of nanoparticle shape, size, external environment, and illumination conditions will be considered. One of the main ideas of the project is to use multipole modes, higher than the dipole ones, which can be resonantly excited by light in high refractive index dielectric (semiconductor) nanoparticles for the design of metasurfaces and optical devices for a robust control and manipulation of light energy. For this purpose, we suggest to develop and use a novel theoretical approach based on discrete multipole approximation. This method will include a combination of electric and magnetic multipole polarizabilities of single nanoparticles together with the coupled-multipole equations.Additionally, investigation will include interactions of high refractive index dielectric (semiconductor) nanoparticles with surface electromagnetic waves (surface plasmon-polaritons) excited on metal-dielectric interfaces. Potential applications of nanoparticles and metasurfaces in flat displays, energy harvesting systems, and integrated optics will be considered. The project results will be visualized in computer experiments which will be realized as a software complex.

• DFG Programme: Research Grants
• Cooperation Partners: Professor Dr. Boris Chichkov; Professor Dr. Carsten Reinhardt