Indexed by: Journal paper

First Author: Lu Wang

Correspondence Author: Tao Wang

Journal: NANO LETTERS

Included Journals: SCI

Affiliation of Author(s): 华中科技大学

Place of Publication: 美国

Discipline: Engineering

First-Level Discipline: Other specialties in Optical Engineering

Funded by: 国基金

Document Type: J

Volume: 23

Issue: 12

Page Number: 5581 - 5587

Key Words: all-dielectric; metasurface; structural colors; polarization-tunable colors; encryption; Mie resonance

Date of Publication: 2023-06-01

Impact Factor: 12.0

Teaching and Research Group: 武汉光电国家研究中心

Abstract: Metasurface-based structural color with high resolutionis promisingfor color printing and encryption. However, achieving tunable structuralcolors in practical applications is challenging owing to the immutabilityafter the fabrication of metasurfaces. Herein, we proposed the polarization-switchabledielectric metasurfaces with full colors. The colorful images canbe switched on/off by controlling the polarization of incident light.For the nanorods metasurfaces, all colors turned to black in the "off"mode because of the near-zero reflection, and the uniform black wasadvantageous for designing encryption applications. For the nanocrossesmetasurfaces, colors reversed in two different "on"modes and images hidden in the "off" mode. With thepolarization-sensitive metasurfaces, a fish-bird image, anoverlapped dual-channel image, and a green-red heart imagewere obtained, respectively. The demonstrations can be applied todynamic displays, optical cryptography, multichannel imaging, andoptical data storage.