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Updated: May 10, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms

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Nonlinear Optical Information Encoding with Grayscale Lithography Enabled Metasurfaces.

Junhong Deng¹, Zixian Hu¹, Yu Chen¹

¹Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.

|April 28, 2025

Summary

This summary is machine-generated.

Researchers developed a new method for optical information encoding using hybrid metasurfaces. This technique allows for precise control over light

Keywords:

epsilon-near-zero material grayscale lithography information encoding nonlinear metasurface

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Area of Science:

Nanophotonics
Metasurfaces
Optical Information Encoding

Background:

Optical information encoding is crucial for sensing, data storage, and computing.
Optical metasurfaces offer flexible light manipulation but often require multiple meta-atoms per unit cell, limiting information density.
Existing metasurface designs struggle to achieve simultaneous amplitude and phase control efficiently.

Purpose of the Study:

To develop a novel approach for high-density optical information encoding.
To achieve precise control over both amplitude and phase of light at the single-pixel level.
To explore advanced nonlinear nanophotonic sources.

Main Methods:

Fabrication of hybrid metasurfaces using gold plasmonic meta-atoms on an epsilon-near-zero material.
Utilizing electron beam grayscale lithography to control spacer layer thickness.
Varying the orientation angles of meta-atoms for light manipulation.

Main Results:

Demonstrated single-pixel level control of both amplitude and phase of generated second-harmonic waves.
Achieved high information density by overcoming limitations of traditional metasurfaces.
Successfully encoded optical information using nonlinear effects.

Conclusions:

The developed method enables advanced nonlinear optical information encoding.
This approach opens new possibilities for creating sophisticated nonlinear nanophotonic devices.
The hybrid metasurface design offers a promising platform for future optical technologies.