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Related Experiment Video

Updated: Jun 5, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Multi-frequency amplitude-programmable metasurface for multi-channel electromagnetic controls.

Rui Yuan Wu^1,2, Shi He^1,2, Jun Wei Wu^1,2

¹Institute of Electromagnetic Space, Southeast University, Nanjing 210096, China.

Nanophotonics (Berlin, Germany)

|December 5, 2024

Summary

This summary is machine-generated.

This study introduces a multi-frequency amplitude-programmable (MFAP) metasurface for advanced electromagnetic data manipulation. This programmable metasurface enables independent, real-time control of amplitude signals across multiple frequency channels.

Keywords:

amplitude control multi-frequency programmable metasurface

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Area of Science:

Electromagnetics
Materials Science

Background:

Conventional metasurfaces offer limited real-time control over electromagnetic (EM) waves.
Digital and programmable metasurfaces provide enhanced collaboration between information and physics.
Sophisticated real-time controls are needed for advanced EM wave manipulation.

Purpose of the Study:

To propose a novel multi-frequency amplitude-programmable (MFAP) metasurface.
To enable simultaneous and independent encoding of reflected amplitudes (high/low) across multiple frequency channels.
To demonstrate flexible multi-functional EM operations with frequency.

Main Methods:

Design of a multi-frequency amplitude-programmable (MFAP) metasurface.
Utilizing square-split ring meta-atoms with varactor diodes for amplitude control.
Switching varactors on metallic structures to modify amplitude codes at each frequency channel.

Main Results:

Achieved simultaneous and independent amplitude encoding (high/low) across multiple frequency channels.
Demonstrated unique amplitude coding with control over reflection coefficients and radiation patterns.
Verified MFAP metasurface functionality through simulations and measurements of a dual-channel prototype.

Conclusions:

The proposed MFAP metasurface offers precise manipulation of EM power through complex spatial coding.
Enables innovative communication systems with individual signal transmission across channels.
Facilitates multi-bit transmissions by combining frequency channels for advanced EM data handling.