article published yes Hammad Ahmed author Yuttana Intaravanne author Yang Ming author Muhammad Afnan Ansari author Gerald S. Buller author Thomas Zentgraf author 305250000-0002-8662-1101 Xianzhong Chen author 15 department 230 department 289 department 623 department Inspired by plant grafting, grafted vortex beams can be formed through grafting two or more helical phase profiles of optical vortex beams. Recently, grafted perfect vortex beams (GPVBs) have attracted much attention due to their unique optical properties and potential applications. However, the current method to generate and manipulate GPVBs requires a complex and bulky optical system, hindering further investigation and limiting its practical applications. Here, a compact metasurface approach for generating and manipulating GPVBs in multiple channels is proposed and demonstrated, which eliminates the need for such a complex optical setup. A single metasurface is utilized to realize various superpositions of GPVBs with different combinations of topological charges in four channels, leading to asymmetric singularity distributions. The positions of singularities in the superimposed beam can be further modulated by introducing an initial phase difference in the metasurface design. The work demonstrates a compact metasurface platform that performs a sophisticated optical task that is very challenging with conventional optics, opening opportunities for the investigation and applications of GPVBs in a wide range of emerging application areas, such as singular optics and quantum science. Wiley2022 eng Mechanical EngineeringMechanics of MaterialsGeneral Materials Science 0935-9648 1521-409510.1002/adma.202203044 3430 Ahmed, Hammad, Yuttana Intaravanne, Yang Ming, Muhammad Afnan Ansari, Gerald S. Buller, Thomas Zentgraf, and Xianzhong Chen. “Multichannel Superposition of Grafted Perfect Vortex Beams.” <i>Advanced Materials</i> 34, no. 30 (2022). <a href="https://doi.org/10.1002/adma.202203044">https://doi.org/10.1002/adma.202203044</a>. H. Ahmed, Y. Intaravanne, Y. Ming, M.A. Ansari, G.S. Buller, T. Zentgraf, X. Chen, Advanced Materials 34 (2022). Ahmed, H., Intaravanne, Y., Ming, Y., Ansari, M. A., Buller, G. S., Zentgraf, T., &#38; Chen, X. (2022). Multichannel Superposition of Grafted Perfect Vortex Beams. <i>Advanced Materials</i>, <i>34</i>(30), Article 2203044. <a href="https://doi.org/10.1002/adma.202203044">https://doi.org/10.1002/adma.202203044</a> H. Ahmed <i>et al.</i>, “Multichannel Superposition of Grafted Perfect Vortex Beams,” <i>Advanced Materials</i>, vol. 34, no. 30, Art. no. 2203044, 2022, doi: <a href="https://doi.org/10.1002/adma.202203044">10.1002/adma.202203044</a>. Ahmed H, Intaravanne Y, Ming Y, et al. Multichannel Superposition of Grafted Perfect Vortex Beams. <i>Advanced Materials</i>. 2022;34(30). doi:<a href="https://doi.org/10.1002/adma.202203044">10.1002/adma.202203044</a> @article{Ahmed_Intaravanne_Ming_Ansari_Buller_Zentgraf_Chen_2022, title={Multichannel Superposition of Grafted Perfect Vortex Beams}, volume={34}, DOI={<a href="https://doi.org/10.1002/adma.202203044">10.1002/adma.202203044</a>}, number={302203044}, journal={Advanced Materials}, publisher={Wiley}, author={Ahmed, Hammad and Intaravanne, Yuttana and Ming, Yang and Ansari, Muhammad Afnan and Buller, Gerald S. and Zentgraf, Thomas and Chen, Xianzhong}, year={2022} } Ahmed, Hammad, et al. “Multichannel Superposition of Grafted Perfect Vortex Beams.” <i>Advanced Materials</i>, vol. 34, no. 30, 2203044, Wiley, 2022, doi:<a href="https://doi.org/10.1002/adma.202203044">10.1002/adma.202203044</a>. 320682022-06-20T11:05:50Z2023-05-12T11:20:44Z