Efficient weakly-radiative wireless energy transfer: An EIT-like approach
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EIT_AOP(final).pdf
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1.62 MB
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Author(s)
Hamam, Rafif E.
Karalis, Aristeidis
Soljacic, Marin
Joannopoulos, John
Date Issued
May 2009
Journal
Annals of Physics
Publisher
Elsevier Inc.
Citation
Hamam, Rafif E. et al. “Efficient weakly-radiative wireless energy transfer: An EIT-like approach.” Annals of Physics 324.8 (2009): 1783-1795.
Version
Author's final manuscript
Abstract
Inspired by a quantum interference phenomenon known in the atomic physics community as electromagnetically induced transparency (EIT), we propose an efficient weakly radiative wireless energy transfer scheme between two identical classical resonant objects, strongly coupled to an intermediate classical resonant object of substantially different properties, but with the same resonance frequency. The transfer mechanism essentially makes use of the adiabatic evolution of an instantaneous (so called “dark”) eigenstate of the coupled 3-object system. Our analysis is based on temporal coupled mode theory (CMT), and is general enough to be valid for various possible sorts of coupling, including the resonant inductive coupling on which witricity-type wireless energy transfer is based. We show that in certain parameter regimes of interest, this scheme can be more efficient, and/or less radiative than other, more conventional approaches. A concrete example of wireless energy transfer between capacitively-loaded metallic loops is illustrated at the beginning, as a motivation for the more general case. We also explore the performance of the currently proposed EIT-like scheme, in terms of improving efficiency and reducing radiation, as the relevant parameters of the system are varied.
MIT Department
Massachusetts Institute of Technology. Center for Materials Science and Engineering
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
http://dx.doi.org/10.1016/j.aop.2009.05.005
