Figure 3 | Scientific Reports

Figure 3

From: Top-down, decoupled control of constitutive parameters in electromagnetic metamaterials with dielectric resonators of internal anisotropy

Figure 3

Anisotropic meta-atoms (εr ≠ εθ) of nano-pizza cut geometry with (a) 40 slices and (b) 8 slices. (inset in (a) shows an example of nano-donut). Calculated εeff and μeff for meta-atoms lattice of radius (c) R = 0.4a (a = 1.5 cm), and (d) R = 0.45a (a = 600 nm). By appropriate choice of a, the operating frequency is determined. Circles indicate the frequencies of operation at matched zero index and horizontal dashed lines indicate εeff = 0 and μeff = 0. Excellent agreement between the theory and numerical results (for both 40 slice and 8 slice implementations), especially near the matched zero index, are observed.

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