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

该项目致力于对任意形状的高折射率介电纳米粒子及其组成的复杂纳米结构的光学性质进行详细的理论和数值研究。这些粒子和粒子结构支持强烈的共振光学响应，在实现多功能亚表面和新型集成光学元件方面具有巨大的潜力。将考虑纳米粒子的形状、大小、外部环境和光照条件的影响。该项目的主要思想之一是使用高于偶极模式的多极模式，这种模式可以被高折射率介电(半导体)纳米粒子中的光共振激发，用于设计超表面和光学器件，以实现对光能的强大控制和操纵。为此，我们建议发展和使用一种新的基于离散多极近似的理论方法。这种方法将包括单个纳米粒子的电磁多极极化率和耦合多极方程的组合。此外，还将研究高折射率介质(半导体)纳米粒子与金属-介质界面上激发的表面电磁波(表面等离子激元-极化子)的相互作用。纳米粒子和准表面在平板显示器、能量采集系统和集成光学中的潜在应用将被考虑。项目结果将在计算机实验中可视化，并将实现为软件综合体。

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.