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Simulation parameters of the double-layer diffraction structure.
| Parameter | Value |
|---|---|
| Design wavelength | 1550 nm |
| Diameter of structure | 60 μm |
| Off-axis Angle | 10° |
| Focal length of off-axis meta-lens | 137.08 μm |
| Phase distribution slope of subwavelength grating | 11.203 × 104 |
| Unit structure period | 500 nm |
