FIGURE 1.

Hybridization scheme and mode field profiles of the first transverse electric (TE) mode of two coupled dielectric resonators. The electromagnetic coupling of the individual TE_01δ modes of the single DRs, initially at the same frequency f₀ gives rise to two coupled modes whose frequencies are shifted lower and higher than f₀.The lower‐frequency, symmetric mode is denoted (++) and is equivalent to a magnetic dipole longer than the initial TE_01δmode with zero coupling. The higher‐frequency, antisymmetric mode, denoted (+‐), corresponds to two magnetic dipoles aligned in opposite directions such that the electromagnetic (EM) field maps represent the H‐ and E‐fields of the single resonator TE_01δ mode and of the coupled modes. The maps were obtained with the Eigenmode Solver of CST Studio, normalized w.r.t. the maximum in each case and plotted on a linear scale from 0 to 1. The graph on the right represents the H‐field magnitude profiles along the resonator axis for the (++) (purple line) and (+‐) (orange dotted line) modes. For comparison, the H‐field amplitude of the original TE_01δ mode has been displayed for each single resonator (blue dashed line)