Table 5 S11 for different thicknesses of insulator layer with a 5 nm thick metallic layer.

From: A high-performance ultra-compact plasmonic metamaterial structure for optical THz absorption

Metallic layer thickness (nm)

6

9

12

15

18

Bandwidth for S11 < -15dB (THz)

810–1500

380–1500

290–1130

270–840

250–670

Minimum value of S11 (dB)

-22.8

-23.3

-37.4

-50.32

-32.37

Resonant frequency (THz)

1500

940

670

470

400