Near-Zero-Refractive-Index Structure at Optical Frequencies

Figure 8

(a) The power confinement factor versus the operating frequency for mode orders 𝑚=0,1,2, and 3. (b) The power attenuation versus the operating frequency for modes orders 𝑚=1,2, and 3. Note that 𝑚=0 (dash), 𝑚=1 (dot-dashed), 𝑚=2 (dotted), and 𝑚=3 (solid).

(a)

(b)