| dc.description.abstract | Full-screen mobile phones will be the trend of future, but limited by the fact that the camera lens is hidden under the screen, it will be affected by the diffraction of the screen structure, and high-quality images cannot be obtained. In this paper, the FDTD simulation analysis is used to design a metacorrector to correct the diffracted light of the grating structure. The results of this research will be applied to the off-screen display system in the future. In the simulation, the phase is modulated by rotating the nanocolumn, and the phase-conjugated metasurface is designed with the grating to achieve the effect of eliminating diffraction. The best result obtained in the research is that the zeroth-order efficiency is increased from 7.34% to 86% after adding the metacorrector designed with PB-Phase characteristics behind the grating. We further investigated the efficiency variation of misalignment between metacorrector and grating. When the misalignment is in the horizontal direction, the deviation from ∆_x=165 nm (half unit cell) reduces the efficiency by 15%. When the metacorrector is away from the optimal spacing at ∆_z=±300 nm, the efficiency remains above 80%. These two situations can be effectively overcome under the semiconductor process technology. Finally, the efficiency reduces by 15% when the incident light is offset at one degree. Therefore, it can be used in telescope systems at present. In the broadband analysis of the component, the efficiency of the red, green, and blue light is 86%, 58% and 28%, respectively. | en_US |