biostudies-literatureUnknown12(9)Sun XThe polarization multiplexing technique is a well-established method that improves the communication capacity of an optical system. In this paper, we designed orthogonal linear and circular polarization multiplexing metalens using a library of rectangle TiO₂ nanostructures. The former can independently focus x- and y-linearly polarized incident lights to designed positions with a focusing efficiency of 53.81% and 51.56%, respectively, whereas the latter with two preset focal points can independently control left and right circularly polarized incident lights with a focusing efficiency of 42.45% and 42.46%, respectively. We also show that both metalenses can produce diffraction-limited focal spots for four polarization states with no obvious distortion, which opens up new applications in polarization imaging and polarization detection.Nanomaterials (Basel, Switzerland)1500https://www.ebi.ac.uk/biostudies/studies/S-EPMC9103879biostudies-literatureHigh-Efficiency Polarization Multiplexing Metalenses.PMC9103879Ge SLi XMa RWang QZhou SPu XSun XCheng JLiu WfalseHigh-Efficiency Polarization Multiplexing Metalenses.The polarization multiplexing technique is a well-established method that improves the communication capacity of an optical system. In this paper, we designed orthogonal linear and circular polarization multiplexing metalens using a library of rectangle TiO₂ nanostructures. The former can independently focus x- and y-linearly polarized incident lights to designed positions with a focusing efficiency of 53.81% and 51.56%, respectively, whereas the latter with two preset focal points can independently control left and right circularly polarized incident lights with a focusing efficiency of 42.45% and 42.46%, respectively. We also show that both metalenses can produce diffraction-limited focal spots for four polarization states with no obvious distortion, which opens up new applications in polarization imaging and polarization detection.2022-01-01T00:00:00Z2022 Apr2025-04-04T22:53:29.85Z2025-02-19T00:55:47.467ZS-EPMC91038793556420910.3390/nano12091500