Figure 2. MIM WG based plasmonic sensor designs based on
different cavity shapes, (a) side coupled square cavity, (b) end coupled
ring cavity, (c) asymmetric structure, (d) ring and a rectangular, (e)
side coupled ring and a defect , (f) end coupled square cavity, (g) side
coupled split ring cavity, (h) cavity with defect, (i) T-shaped cavity
with nanorods, (j) L-shaped cavity, (k)dual hexagonal cavities, (l) side
coupled ring with baffles, (m) horizontal eight shape, (n)horn shaped
cavity, (o) racetrack and circular cavity.
Table 1. Sensing characteristics of MIM WG-based plasmonic sensors