title: Aluminum plasmonic multicolor meta-hologram.
abstract: We report a phase-modulated multicolor meta-hologram (MCMH) that is polarization-dependent and capable of producing images in three primary colors. The MCMH structure is made of aluminum nanorods that are arranged in a two-dimensional array of pixels with surface plasmon resonances in red, green, and blue. The aluminum nanorod array is patterned on a 30 nm thick SiO2 spacer layer sputtered on top of a 130 nm thick aluminum mirror. With proper design of the structure, we obtain resonances of narrow bandwidths to allow for implementation of the multicolor scheme. Taking into account of the wavelength dependence of the diffraction angle, we can project images to specific locations with predetermined size and order. With tuning of aluminum nanorod size, we demonstrate that the image color can be continuously varied across the visible spectrum.
authors.affiliation: †Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Yao-Wei
authors.initials: YW
authors.lastname: Huang
authors.affiliation: †Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Wei Ting
authors.initials: WT
authors.lastname: Chen
authors.affiliation: †Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Wei-Yi
authors.initials: WY
authors.lastname: Tsai
authors.affiliation: †Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Pin Chieh
authors.initials: PC
authors.lastname: Wu
authors.affiliation: ‡Institute of Opto-electronic Engineering, National Dong Hwa University, Hualien 97401, Taiwan.
authors.forename: Chih-Ming
authors.initials: CM
authors.lastname: Wang
authors.affiliation: §Department of Engineering, University of Massachusetts Boston, Boston, Massachusetts 02125, United States.
authors.forename: Greg
authors.initials: G
authors.lastname: Sun
authors.affiliation: †Department of Physics, National Taiwan University, Taipei 10617, Taiwan.|∥Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
authors.forename: Din Ping
authors.initials: DP
authors.lastname: Tsai
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D003116:Color; D006696:Holography / Q000379:methods*; D008027:Light; D036103:Nanotechnology; D043942:Nanotubes / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry; D020349:Surface Plasmon Resonance
chemical_list: D012822:Silicon Dioxide; D000535:Aluminum
keywords: Metasurfaces; aluminum plasmonics; holography; meta-hologram; multicolor; nanoantennas; polarization; switching