Lei Chen, Jinhua Yan, Huanxiang Guo, Hang Zhang. Highly Efficient Large-Angle Beam Deflection Based on Silicon-Based Metasurface[J]. Acta Optica Sinica, 2021, 41(3): 0305001
- Acta Optica Sinica
- Vol. 41, Issue 3, 0305001 (2021)
![Schematic diagram of derivation of generalized law of refraction[16]](/richHtml/gxxb/2021/41/3/0305001/img_1.jpg)
Fig. 1. Schematic diagram of derivation of generalized law of refraction[16]
Fig. 2. Structural diagrams and phase of metasurface resonance cell. (a) Structure of metasurface resonance cell; (b) 2D cross section; (c) phase distribution
Fig. 3. Phase delay curve of silicon nano-beam
Fig. 4. Structural diagram of gradient metasurface
Fig. 5. Simulated phase distribution and deflection efficiency of plane-wave passing through gradient metasurface. (a) Distribution of phase; (b) deflection efficiency
Fig. 6. Far-field distribution for different cell numbers n (take deflection angle of 30° as an example)
Fig. 7. Relationship between deflection angle θ and size d for normal incident light
Fig. 8. Effect of number of period on far-field divergence angle (take deflection angle of 30° as an example)
Fig. 9. Far-field distribution for different deflection angles
Fig. 10. Far-field divergence angle for different deflection angles
Fig. 11. Influence of relative deviation of W and H on deflection effect
Fig. 12. Influence of divergence angle of incident light on divergence angle of deflected light
Fig. 13. Influences of different wavelengths on beam deflection
Fig. 14. Schematic diagram of angle scanning
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