Table 8 Comparative analysis of proposed work with various absorbers in the optical radiation regime.
From: A high-performance ultra-compact plasmonic metamaterial structure for optical THz absorption
Ref. | Top layer structure | Unit cell dimension | No. of layers | Material utilized | Operating frequency band (THz) | Bandwidth of operation (THz) | Polarization independency and angular stability | % Average absorption |
|---|---|---|---|---|---|---|---|---|
Square and cicular with short stubs | 375 nm × 375 nm × 465 nm | Four | Ti, Si3 N4 | 120–1070 | 950 | Yes up to 60° | 98.19% | |
Circular ring with square | 300 nm × 300 nm × 195 nm | Three | Ti, SiO2 | 375–750 | 375 | Yes up to 60° | 98.11% | |
Staked pentagon with SiO2 covering | 225 nm × 225 nm × 360 nm | Three | W, SiO2 | 125–750 | 625 | Yes up to 45° | 92% | |
Rectangular and squared multilayer | 750 nm × 750 nm × 550 nm | Multi-layer | Ti-SiO2-Ti coated with SiO2/ Si3 N4 | 158–597 122–534 | 439 412 | Yes up to 60° | 95% 87% | |
Square ring with squared stub | 300 nm × 300 nm × 190 nm | Three | Mn, SiO2 | 374–750 | 375 | Yes up to 60° | 94% | |
*P | Multiple flower ring shaped | 66 nm × 66 nm × 26 nm | Three | Ni, SiO2 | 180–1500 | 1320 | Yes up to 60° | 97.91% |
