Optical seminar | 31 August 2022

The thesis is devoted to the study of the interaction of electromagnetic waves with particles that are small compared to the wavelength of the incident radiation, as well as ordered and disordered systems of such particles. The creation of new materials with desired properties, new radiation sources, devices for controlling light fluxes and diagnosing various media requires the development of a general theoretical description of wave scattering by inhomogeneities of the medium. The scale invariance of Maxwell's equations makes it possible to build a general theory and create analytical models valid for a wide range of frequencies based on the description of scattering by dipole responses and, more generally, in terms of the multipole expansion. In thesis this is reflected on examples of problems in different area: determining the effective dielectric and magnetic characteristics of disperse media for calculation of microwave absorption in ceramic composites or metal powders as well as scattering and nonlinear harmonic geheration by subwavelength dielectric resonators for effective control of radiation in the optical and infrared frequency ranges.

Main paper/arXiv, related to the seminar, and other references

1. Volkovskaya I., Smirnova D., Xu L., Huang L., Smirnov A. I., and Miroshnichenko A. Multipolar second-harmonic generation from high-𝑄 quasi-BIC states in subwavelength resonators // Nanophotonics. 2020. Vol. 9 (12) P. 3953-3963.
2. Frizyuk K., Volkovskaya I., Smirnova D., Poddubny A., and Petrov M. Second-harmonic generation in Mie-resonant dielectric nanoparticles made of noncentrosymmetric materials // Phys. Rev. B. 2019, Vol. 99, 075425.
3. Волковская И. И., Семенов В. Е., Рыбаков К. И. Эффективная высокочастотная магнитная проницаемость компактированных металлических порошковых материалов // Известия вузов. Радиофизика. 2017. Т. 60 (10), С. 892–903.
4. Волковская И. И., Еремеев А. Г., Быков Ю. В. Измерение коэффициента поглощения микроволнового излучения в керамических и композиционных материалах при высоких температурах // Известия вузов. Радиофизика. 2018. Т. 61 (4). С. 321–331.