Table 3 Absorption for different design steps.

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

Designs

Design 1

Design 2

Design 3

Design 4

Design 5 (Proposed design)

Design 6

Frequency range for absorption > 90% (THz)

320–680

290–780

260–910

220–1190

180–1500

150–1500

Bandwidth of operation (THz)

360

490

650

970

1320

1350

Percentage average absorption in the band of operation (abs)

80.69

84.12

88.71

94.14

97.91

97.32

Peak absorption frequency point (THz)

490

510

530

570

670

840