Laser & Optoelectronics Progress, Volume. 61, Issue 10, 1000001(2024)
China's Top Ten Advances in Optics: Research Progress on Optical Applications of Anomalous Deflection Metasurfaces (Invited)
Fig. 1. Diagram of generalized Snell's law[56]
Fig. 2. Gradient phase metasurfaces. (a) Gradient phase metasurfaces based on V-shaped metal antennas[56]; (b) high-efficiency gradient phase metasurfaces with metal-dielectric-metal configuration[50]; (c) broadband high-efficiency gradient phase metasurfaces based on trapezoidal metal structures[66]; (d) gradient phase metasurfaces based on dielectric materials[61]
Fig. 3. Physics requirement for perfect anomalous reflection[58]. (a) Schematic of perfect anomalous deflection, arbitrary beam steering can be achieved by the modulation of metasurface; (b) phase requirement of metasurface at different spatial positions under the condition of different deflection angles; (c) amplitude requirement of metasurface at different spatial positions under the condition of different deflection angles
Fig. 5. Perfect anomalous reflector based on the Q3D-SWS[55]. (a) Schematic of Q3D-SWS; (b) comparison with published works; (c) SEM side-view image and cross-section image of the sample; (d) broadband spectra measured in the experiment and calculated in the design
Fig. 6. Schematic of beam steering systems based on anomalous deflection metasurfaces. (a)(b) Anomalous deflection metasurfaces beam steering systems based on TCO materials[76-77]; (c) (d) anomalous deflection metasurfaces beam steering systems based on liquid crystals[78-79]; (e) anomalous deflection metasurfaces beam steering system based on MQWs[80]; (f) anomalous deflection metasurfaces beam steering systems based on MEMS[81]; (g) anomalous deflection metasurfaces beam steering systems based on phase-change materials[82]
Fig. 8. Schematic of splitters based on anomalous deflection metasurfaces. (a) Wavelength-dependent beam splitter based on anomalous deflection metasurfaces[90]; (b) polarization-dependent beam splitter based on anomalous deflection metasurfaces[91]; (c) power-dependent beam splitter based on anomalous deflection metasurfaces[92]
Fig. 12. Schematic of integrated light sources based on anomalous deflection metasurfaces. (a) External cavity laser based on anomalous deflection metasurfaces[85]; (b) VCSEL directional emission based on anomalous deflection metasurfaces[86]; (c) LED directional emission based on anomalous deflection metasurfaces[87]
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Chengfeng Li, Tao He, Yuzhi Shi, Zeyong Wei, Zhanshan Wang, Xinbin Cheng. China's Top Ten Advances in Optics: Research Progress on Optical Applications of Anomalous Deflection Metasurfaces (Invited)[J]. Laser & Optoelectronics Progress, 2024, 61(10): 1000001
Category: Reviews
Received: Sep. 28, 2023
Accepted: Nov. 20, 2023
Published Online: Mar. 22, 2024
The Author Email: He Tao (hetao@tongji.edu.cn), Cheng Xinbin (chengxb@tongji.edu.cn)