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Table 1 Comparison between the designed triple-band absorber and previously reported triple-band metamaterial absorbers

From: Miniaturized and Actively Tunable Triple-Band Terahertz Metamaterial Absorber Using an Analogy I-Typed Resonator

References Number of absorption peaks Number of sub-resonators Polarization tolerance Active modulation Working region Main materials Fabrication steps
[37] 3 3 No Yes Mid-infrared Graphene Rather Difficult
[38] 3 2 Yes No Microwave Copper Easy
[39] 3 3 Yes No Microwave Copper Easy
[40] 3 5 Yes No Microwave Copper Easy
[41] 3 4 No Yes Terahertz Graphene Rather Difficult
[42] 3 6 Yes No Terahertz Gold Easy
[43] 3 3 Yes No Microwave Copper Easy
[44] 3 3 Yes No Microwave Copper Easy
[45] 3 6 Yes No Microwave Copper Easy
[46] 3 5 Yes No Near-infrared Gold Difficult
[47] 3 3 Yes No Terahertz Aluminum Easy
[48] 3 3 Yes No Mid-infrared Gold Difficult
[49] 3 5 Yes Yes Terahertz Gold Easy
[50] 3 5 No Yes Terahertz VO2 Easy
[51] 3 3 Yes No Terahertz Aluminum Easy
[52] 3 3 No No Terahertz Gold Easy
This work 3 1 Yes Yes Terahertz Gold Easy