Single-layer metasurface with controllable multiwavelength functions Shi, Zhujun Khorasaninejad, Mohammadreza Huang, Yao-Wei Roques-Carmes, Charles Zhu, Alexander Y. Chen, Wei Ting Sanjeev, Vyshakh Ding, Zhao-Wei Tamagnone, Michele Chaudhary, Kundan Devlin, Robert C. Qiu, Cheng-Wei Capasso, Federico Metasurface dispersion engineering visible spectrum titanium dioxide orbital angular momentum states achromatic metalens In this paper, we report dispersion-engineered metasurfaces with distinct functionalities controlled by wavelength. Unlike previous approaches based on spatial multiplexing or vertical stacking of metasurfaces, we utilize a single phase profile with wavelength dependence encoded in the phase shifters’ dispersion. We designed and fabricated a multiwavelength achromatic metalens (MAM) with achromatic focusing for blue (B), green (G), yellow (Y), and red (R) light and two wavelength-controlled beam generators (WCBG): one focuses light with orbital angular momentum (OAM) states (l = 0,1,2) corresponding to three primary colors; the other produces ordinary focal spots (l = 0) for red and green light, while generating a vortex beam (l = 1) in the blue. A full color (RGB) hologram is also demonstrated in simulation. Our approach opens a path to applications ranging from near-eye displays and holography to compact multiwavelength beam generation. American Chemical Society 2018 info:eu-repo/semantics/article doc-type:article article http://purl.org/coar/resource_type/c_6501 https://research-explorer.ista.ac.at/record/21523 Shi Z, Khorasaninejad M, Huang Y-W, et al. Single-layer metasurface with controllable multiwavelength functions. <i>Nano Letters</i>. 2018;18(4):2420-2427. doi:<a href="https://doi.org/10.1021/acs.nanolett.7b05458">10.1021/acs.nanolett.7b05458</a> eng info:eu-repo/semantics/altIdentifier/doi/10.1021/acs.nanolett.7b05458 info:eu-repo/semantics/altIdentifier/issn/1530-6984 info:eu-repo/semantics/altIdentifier/e-issn/1530-6992 info:eu-repo/semantics/altIdentifier/pmid/29461838 info:eu-repo/semantics/closedAccess