Table 1 Performance comparison of earlier reported designs in the references with our design.
From: A Wide-angle Multi-Octave Broadband Waveplate Based on Field Transformation Approach
Material type | Operation mode | Bandwidth (−3DB) | Peak Efficiency | Incident angle | Reference |
|---|---|---|---|---|---|
Silver grating | Reflective Half-waveplate | Over 70% (optical 600 nm) | 90% | Normal incidence | 4 |
Metallic grating | Reflective Half-waveplate | 57% (14 GHz) | 95% | 11.5° | 7 |
Anisotropic Metamaterial | Reflective Half-waveplate | 12% (13.5 GHz) | 95% (80% for 45°) | 0–45° | 8 |
Chiral Metamaterial | Transmitted Half-waveplate | 8% (12.5GHz) | 97% | Normal incidence | 9 |
Chiral Metamaterial | Transmitted Half-waveplate | 5% (4.8GHz) | 27.5% | Normal incidence | 10 |
Copper wire grids sheets | Transmitted Quarter-waveplate | 46% | 90% | Normal incidence | 11 |
Metal grids sheets | Transmitted Quarter-waveplate | Over 21% (95 GHz) | 94% | 5° | 12 |
Impedance surfaces | Reflective Quarter-waveplate | Over 40% (13 GHz) | 95% for 0 | 0–45° | 13 |
Meta-surface | Transmitted Quarter-waveplate | 8% (2.4 GHz) | 90% | Normal incidence | 14 |
Our work | Both reflective and transmitted for both quarter and half waveplate | 80% (10 GHz) | 98% | 0–60% |
