@article{21523,
  abstract     = {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.},
  author       = {Shi, Zhujun and Khorasaninejad, Mohammadreza and Huang, Yao-Wei and Roques-Carmes, Charles and Zhu, Alexander Y. and Chen, Wei Ting and Sanjeev, Vyshakh and Ding, Zhao-Wei and Tamagnone, Michele and Chaudhary, Kundan and Devlin, Robert C. and Qiu, Cheng-Wei and Capasso, Federico},
  issn         = {1530-6992},
  journal      = {Nano Letters},
  keywords     = {Metasurface, dispersion engineering, visible spectrum, titanium dioxide, orbital angular momentum states, achromatic metalens},
  number       = {4},
  pages        = {2420--2427},
  publisher    = {American Chemical Society },
  title        = {{Single-layer metasurface with controllable multiwavelength functions}},
  doi          = {10.1021/acs.nanolett.7b05458},
  volume       = {18},
  year         = {2018},
}