Metamaterial Sensors

Figure 4

Sensitivity versus the guiding layer thickness 𝑑₁ for the proposed sensor (𝑎_𝑚=𝜀_𝑚/𝜀_𝑔=−0.5, 𝑛=−0.6, and 𝑑₂=30 nm) with a metamaterial layer (red solid line) and without a metamaterial layer (blue dotted line): (a) normal symmetry (𝑎_𝑠=0.55 and 𝑎_𝑐=0.5) and (b) reverse symmetry (𝑎_𝑠=0.5 and 𝑎_𝑐=0.55). Sensitivity versus the guiding layer thickness 𝑑₁ for TM mode (𝑆_mTM) (red solid line) and TE mode (𝑆_mTE) (blue dotted line) (𝑑₂=20 nm, 𝑎_𝑚=𝜀_𝑚/𝜀_𝑔=−0.5, and 𝑛=−0.6): (c) normal symmetry (𝑎_𝑠=0.55 and 𝑎_𝑐=0.5) and (d) reverse symmetry (𝑎_𝑠=0.5 and 𝑎_𝑐=0.55) [20].

(a)

(b)

(c)

(d)