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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Color Printing and Encryption with Polarization-Switchable Structural Colors on All-Dielectric Metasurfaces.

Lu Wang¹, Tao Wang¹, Ruoqin Yan¹

¹Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.

|June 6, 2023

Summary

Researchers developed polarization-switchable dielectric metasurfaces for tunable structural color. These metasurfaces enable dynamic color switching and offer potential for advanced optical encryption and display technologies.

Keywords:

Mie resonance all-dielectric metasurface encryption polarization-tunable colors structural colors

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Last Updated: Jul 27, 2025

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Patterning via Optical Saturable Transitions - Fabrication and Characterization

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Published on: December 11, 2014

Area of Science:

Optics and Photonics
Materials Science
Nanotechnology

Background:

Metasurface-based structural color offers high resolution for applications like printing and encryption.
A key challenge is achieving tunable structural colors due to the fixed nature of fabricated metasurfaces.

Purpose of the Study:

To propose and demonstrate polarization-switchable dielectric metasurfaces capable of producing full, tunable structural colors.
To enable dynamic switching of colorful images on and off using light polarization control.

Main Methods:

Fabrication of dielectric metasurfaces using nanorods and nanocrosses.
Investigation of polarization-dependent reflection and color switching properties.
Demonstration of image switching, color reversal, and hidden image display.

Main Results:

Achieved polarization-switchable full structural colors in dielectric metasurfaces.
Demonstrated 'on' and 'off' modes for colorful images by controlling incident light polarization.
Observed color reversal in nanocross metasurfaces and near-zero reflection (black) in nanorod metasurfaces in the 'off' state.

Conclusions:

Polarization-switchable dielectric metasurfaces provide a pathway to dynamic structural color applications.
The developed metasurfaces are suitable for optical encryption, dynamic displays, multichannel imaging, and optical data storage.