Table 1. Material and geometric parameters of composite structure of alternately arranged IM–IIM that is used to obtained in Fig. 5.

Figure	5 (a)	5 (b)	5 (c)	5 (d)	5 (e)
Metal	Cu	Cu	Cu	Cu	Ag
Operating frequency (wavelength)	432.9 THz (682.52 nm)	431.63 THz (694.56 nm)	432.9 THz (682.52 nm)	350 THz (857 nm)	723.52 THz (414.35 nm)
Simulation domain X × Y × Z	440 × 800 × 130 (nm3)	440 × 800 × 130 (nm3)	440 × 800 × 130 (nm3)	440 × 800 × 130 (nm3)	440 × 550 × 120 (nm3)
IM
Width (d1)	15 nm	15 nm	15 nm	15 nm	15 nm
Height	130 nm	130 nm	130 nm	130 nm	120 nm
ε1	2	2.25	2	2.25	4
IIM
Width (d2)	15 nm	15 nm	× nm	15 nm	15 nm
Height (t)	8.0 nm	8.0 nm	× nm	8.0 nm	8.5 nm
ε2	1	1	×	1	1
ε3	4	4	×	4	6.5