Figure 3
From: Creating a zero-order resonator using an optical surface transformation
(a) A 2D open resonator structure we study here: regions 1 and 3 are free space. Region 2 is the concentric ring open resonator filled with the ONM whose main axis is in the θ direction. (b–d) are 2D FEM simulation results for a TE wave case. We plot the absolute value of the electric field’s z component. (b,c) we set a line current with amplitude 1A in the center and deviated λ0/6 from the center of Region 1, respectively. (d) We set five line currents with amplitude 1A in Region 1. The size of the resonator is the same from (b–d): a = 2λ0/3, b = λ0. (e,f) are two normalized eigenmodes of the resonator with the same size as (b) (obtained by the FEM numerical method), which correspond to the zero-order Bessel function and the zero-order Neumann function in Eq. (12), respectively.
