Microwave seminar | 26 July 2021

Nonradiating sources of energy realized under a wave scattering on high-index dielectric nanoparticles have attracted a lot of attention in nano-optics and nanophotonics. They do not emit energy to the far-field but simultaneously provide strong near-field energy confinement. Near-field wireless power transfer technologies suffer from low efficiency and short operation distance. The key factor to improve efficiency is to reduce the radiation loss of the resonators included in the transmitter and receiver. In this presentation, I first talk about our recent results on nonradiating sources in scattering and radiation problems. Then, I will present the results of our investigation on a wireless power transfer system and demonstrate that higher efficiency can be achieved when using non-radiating sources as the transmitter and receiver instead of conventional (radiative) transmitters and receivers due to the radiation loss suppression.

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

1. P. Kapitanova, E. Zanganeh, N. Pavlov, M. Song,P. Belov, A. Evlyukhin, and A. Miroshnichenko, “Seeing the unseen: Experimental observation of magnetic anapole state inside a high-index dielectric particle,” Annalen der Physik, p. 2000293, 2020.

2. A. E. Miroshnichenko, A. B. Evlyukhin, Y. F. Yu,R. M. Bakker, A. Chipouline, A. I. Kuznetsov,B. Luk’yanchuk, B. N. Chichkov, and Y. S. Kivshar, “Nonradiating anapole modes in dielectric nanoparticles,” Nature Communications, vol. 6, no. 1, pp. 1–8,2015.

3. N. A. Nemkov, I. V. Stenishchev, and A. A. Basharin, “Nontrivial nonradiating all-dielectric anapole,” Scientific Reports, vol. 7, no. 1, pp. 1–9, 2017.