Polarization-insensitive colorful meta-holography employing anisotropic nanostructures. Issue 42 (17th October 2019)

• Record Type: Journal Article
• Authors: Zhang, Xiaohu; Tang, Dongliang; Zhou, Li; Jiao, Jiao; Feng, Danqi; Liang, Gaofeng; Guo, Yongcai
• Is Part Of: Nanoscale. Volume 11:Issue 42(2019)
• Page Start: 20238
• Page End: 20244
• Publication Date: 2019-10-17
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c9nr05533a
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A polarization-insensitive colorful meta-hologram was realized using anisotropic elliptical nanoholes. Abstract : Benefiting from advances in nanofabrication technology, emerging metasurfaces are promising for compact and wearable multicolor meta-holograms with large fields of view. However, due to the inherent electromagnetic properties of the structures that are used, current multicolor meta-holograms are often sensitive to the incident light polarization, which greatly restricts the application of meta-holography. Here, we took advantage of the amplitude properties of metasurfaces and the off-axis illumination method to carry out experiments involving polarization-insensitive colorful meta-holography with anisotropic nanostructures. With red, green and blue lasers illuminating the meta-hologram along different angles, a polarization-insensitive colorful holographic image was achieved and the disturbance from zero-order diffraction light was essentially eliminated. To the best of our knowledge, the current work was the first time that a polarization-insensitive colorful meta-hologram with anisotropic nanostructures was experimentally demonstrated. We expect our approach to provide promising prospects for the use of metasurfaces in applications such as flat meta-lenses, data storage and virtual/augmented reality.