Nonradiating Sources for Efficient Wireless Power Transfer
Nanophotonics 2021
Esmaeel Zanganeh, Mingzhao Song, Andria Canos Valero, Alexander S. Shalin, Elizaveta Nenasheva, Andrey Miroshnichenko, Andrey Evlyukhin, Polina Kapitnova

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 provides 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 paper, we develop a wireless power transfer system based on nonradiating sources implemented using colossal permittivity dielectric disk resonator and a subwavelength metal loop. We demonstrate that this nonradiating nature is due to the hybrid anapole state originated by destructive interference of the fields generated by multipole moments of different parts of the nonradiating source, without a contribution of toroidal moments. We experimentally investigate a wireless power transfer system prototype and demonstrate that higher efficiency can be achieved when operating on the nonradiating hybrid anapole state compared to the systems operating on magnetic dipole and magnetic quadrupole modes due to the radiation loss suppression.


Keywords
hybrid anapole state; nonradiating source; power transfer efficiency; radiation loss; wireless power transfer
DOI
10.1515/nanoph-2021-0378
Hyperlink
https://www.degruyter.com/document/doi/10.1515/nanoph-2021-0378/html

Zanganeh, E., Song, M., Valero, A., Shalin, A., Nenasheva, E., Miroshnichenko, A., Evlyukhin, A., Kapitnova, P. Nonradiating Sources for Efficient Wireless Power Transfer. Nanophotonics, 2021, Vol. 10, No. 17, pp.4399-4408. ISSN 2192-8614. Available from: doi:10.1515/nanoph-2021-0378

Publication language
English (en)
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