title: High-efficiency broadband meta-hologram with polarization-controlled dual images.
abstract: Holograms, the optical devices to reconstruct predesigned images, show many applications in our daily life. However, applications of hologram are still limited by the constituent materials and therefore their working range is trapped at a particular electromagnetic region. In recent years, the metasurfaces, an array of subwavelength antenna with varying sizes, show the abilities to manipulate the phase of incident electromagnetic wave from visible to microwave frequencies. Here, we present a reflective-type and high-efficiency meta-hologram fabricated by metasurface for visible wavelength. Using gold cross nanoantennas as building blocks to construct our meta-hologram devices with thickness ∼ λ/4, the reconstructed images of meta-hologram show polarization-controlled dual images with high contrast, functioning for both coherent and incoherent light sources within a broad spectral range and under a wide range of incidence angles. The flexibility demonstrated here for our meta-hologram paves the road to a wide range of applications related to holographic images at arbitrary electromagnetic wave region.
authors: Graduate Institute of Applied Physics, National Taiwan University , Taipei 10617, Taiwan.
authors: Wei Ting
authors: WT
authors: Chen
authors: Kuang-Yu
authors: KY
authors: Yang
authors: Chih-Ming
authors: CM
authors: Wang
authors: Yao-Wei
authors: YW
authors: Huang
authors: Greg
authors: G
authors: Sun
authors: I-Da
authors: ID
authors: Chiang
authors: Chun Yen
authors: CY
authors: Liao
authors: Wei-Lun
authors: WL
authors: Hsu
authors: Hao Tsun
authors: HT
authors: Lin
authors: Shulin
authors: S
authors: Sun
authors: Lei
authors: L
authors: Zhou
authors: Ai Qun
authors: AQ
authors: Liu
authors: Din Ping
authors: DP
authors: Tsai
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D006696:Holography / Q000295:instrumentation*; D007909:Lenses; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D006046:Gold