Braunschweig, HolgerClaes, ChristinaDamme, AlexanderDeisenberger, AndreaDewhurst, Rian D.Horl, ChristianKramer, Thomas2022-08-101359-7345http://hdl.handle.net/1885/270360We analytically show that an incident light can be almost completely diffracted into the −1st order in wide-angle and broadband by suitably designed thin metallic nano-gratings with simple rectangular cross sections. Such extraordinary optical diffraction results from the excitation of localized cavity modes and exists even when the grating period is modulated in a broad range. By modulating the period with binary holography techniques, we can shape an incident wave into arbitrary wavefronts with near-unity conversion efficiencies. To show the efficacy of this approach, we demonstrate three reflection-type metasurfaces for achieving near-complete conversions from a Gaussian beam into a focused beam, Bessel beam, and vortex beam, respectively, with the complete suppression of the undesired specular reflection. Our findings provide a facile approach to build arbitrary wavefront-shaping metasurfaces with wide-angle, broadband, and high efficiency performance.Weare grateful to the DFG (Deutsche Forschungsgemeinschaft) for financial support.application/pdfen-AU© 2015 The Royal Society of Chemistryborane derivativeboroncarbonhydrogenplatinumsodium chloridestilbene derivativechemical structurecovalent bondcyclizationcycloadditiondehalogenationdiastereoisomerenantiomerhydroborationmolecular stabilityproton nuc201510.1039/c4cc09036e2021-08-01