Up-And-Coming Physical Concepts of Wireless Power Transfer Mingzhao Song1,2 *, Prasad Jayathurathnage3, Esmaeel Zanganeh1, Mariia Krasikova1, Pavel Smirnov1, Pavel Belov1, Polina Kapitanova1, Constantin Simovski1,3, Sergei Tretyakov3, and Alex Krasnok4 * 1School of Physics and Engineering, ITMO University, 197101, Saint Petersburg, Russia 2College of Information and Communication Engineering, Harbin Engineering University, 150001 Harbin, China 3Department of Electronics and Nanoengineering, Aalto University, P.O. Box 15500, FI-00076 Aalto, Finland 4Photonics Initiative, Advanced Science Research Center, City University of New York, NY 10031, USA *e-mail:
[email protected],
[email protected] Abstract The rapid development of chargeable devices has caused a great deal of interest in efficient and stable wireless power transfer (WPT) solutions. Most conventional WPT technologies exploit outdated electromagnetic field control methods proposed in the 20th century, wherein some essential parameters are sacrificed in favour of the other ones (efficiency vs. stability), making available WPT systems far from the optimal ones. Over the last few years, the development of novel approaches to electromagnetic field manipulation has enabled many up-and-coming technologies holding great promises for advanced WPT. Examples include coherent perfect absorption, exceptional points in non-Hermitian systems, non-radiating states and anapoles, advanced artificial materials and metastructures. This work overviews the recent achievements in novel physical effects and materials for advanced WPT. We provide a consistent analysis of existing technologies, their pros and cons, and attempt to envision possible perspectives. 1 Wireless power transfer (WPT), i.e., the transmission of electromagnetic energy without physical connectors such as wires or waveguides, is a rapidly developing technology increasingly being introduced into modern life, motivated by the exponential growth in demand for fast and efficient wireless charging of battery-powered devices.