Plasmonic Filters Based on Lithographically Patterned and Hexagonally Arranged Triangular Silver Nanoparticles Array

Figure 9

The SEM images of silver nanoparticle arrays for different thicknesses with fixed period of 230 nm: (a) 30 nm; (b) 35 nm; (c) 40 nm, and (d) 45 nm.

(a)

(b)

(c)

(d)