Theoretical seminar | 06 April 2022

ITMO University
Anapole states of high-refractive-index structures and their application for wireless power transfer

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 talk, I first discuss our 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 using non-radiating sources as the transmitter and receiver instead of conventional (radiative) transmitters and receivers due to the radiation loss suppression.

[1] E. Zanganeh, A. Evlyukhin, A. Miroshnichenko, M. Song, E. Nenasheva, and P. Kapitanova, "Anapole meta-atoms: nonradiating electric and magnetic sources," Physical Review Letters 127, no. 9 (2021): 096804. doi: 10.1103/PhysRevLett.127.096804
[2] E. Zanganeh, M. Song, A.C. Valero, A. S. Shalin, E. Nenasheva, A. Miroshnichenko, A. Evlyukhin, and P. Kapitanova, “Nonradiating Sources for Efficient Wireless Power Transfer,” Nanophotonics, vol. 10, no. 17, 2021, pp. 4399 4408. doi: 10.1515/nanoph-2021-0378
[3] M. Song, P. Jayathurathnage, E. Zanganeh, M. Krasikova, P. Smirnov, P. Belov, P. Kapitanova, C. Simovski, S. Tretyakov and A. Krasnok, “Wireless power transfer based on novel physical concepts,” Nat Electron 4, 707–716 (2021). doi: 10.1038/s41928-021-00658-x
[4] 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 532, no. 12 (2020): 2000293. doi: 10.1002/andp.202000293