  An ab-initio analysis based on coupled mode theory (CMT) is applied to
describe the interaction dynamics of high dielectric resonators (DRs) with its
containing aqueous solution. We prove that the coupling mechanism is
reciprocal. Such property is exploited to find closed form and accurate
expressions of the coupling coefficient, the main factor characterizing the
system performance. Based on such expressions, it is shown that, for wireless
power transfer (WPT) applications, up sizing the DRs relaxes the need of using
ultra high dielectric constant materials. The nature of interaction is captured
by the coupling matrix, which shows that the behaviour of the system is
identical to the ones studied extensively in the literature when the contained
aqueous solution is replaced by an enclosing cavity. It follows, as in a
typical three coupled resonators setting, that when two DRs are inserted in the
aqueous solution a non-bonding mode emerges; hence enabling efficient wireless
power transfer (WPT) via the opening of an electromagnetic induced transparency
like window. Due to the inevitable situations where the DRs are not
symmetrically placed inside the solution, the general eigenvalue problem, with
asymmetrically placed DR inserts is solved and the eigenvectors representing
the coupled modes are depicted by vectors in a 3D mathematical space where the
uncoupled modes represent its basis. Moreover, the strong coupling between the
DR inserts and the aqueous medium allows the proposed WPT system to tolerate
intrinsic aqueous solution losses and the presence of extraneous objects.
Additionally, the value of the load at maximum efficiency is independent of the
aqueous solution loss tangent, thus tolerating the variation of the medium
salinity. The Proposed EIT like scheme can find applications for mid/short
range power transfer in/through swimming pools, chemical reactors, fish tanks,
etc.
