Table 4 S11 for different thicknesses of metallic layer with 12 nm thick insulator layer.

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

Metallic layer thickness (nm)

3

5

7

9

11

Bandwidth for S11 < -15 dB (THz)

330–1010

290–1130

270–1200

260–1190

260–1100

Minimum value of S11 (dB)

-23.52

-37.4

-30.74

-27.81

-30.2

Resonant frequency (THz)

640

670

650

460

430