High-Transmittance Subwavelength Metal Grating with Relief Structure Composed of Multiple Steps

Figure 5

Relationship between groove depth and steps and the transmittance and extinction ratio as a function of wavelength ((a), (c), (e), and (g) stand for the transmittance of TM-polarization; (b), (d), (f), and (h) stand for extinction ratio).

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)