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Updated: May 9, 2025
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Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
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Full-Space Programmable Metasurface for Controlling Both Reflected and Transmitted Waves Under the Same Polarization
Hao Tian Shi1,2, Rui Yuan Wu1,2, Lei Bao1,3
1State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, 210096, China.
Small (Weinheim an Der Bergstrasse, Germany)
|April 30, 2025
Summary
This study introduces a novel full-space programmable metasurface for dynamic control of electromagnetic waves. It enables real-time, independent manipulation of both reflected and transmitted signals in the same frequency and polarization band.
Area of Science:
- Electromagnetic wave manipulation
- Metasurface technology
- Applied physics
Background:
- Metasurfaces offer advanced control over electromagnetic (EM) waves.
- Existing metasurfaces often segregate control by frequency or polarization.
- Real-time control remains a significant challenge in metasurface applications.
Purpose of the Study:
- To propose a novel full-space programmable metasurface.
- To achieve dynamic and independent control of reflected and transmitted EM waves.
- To enable real-time manipulation within the same polarization and frequency band.
Main Methods:
- Design of a reflection-transmission-type meta-atom with five PIN diodes.
- Switching PIN diode states for independent phase adjustment of transmitted and reflected waves.
- Utilizing a field-programmable gate array (FPGA) for real-time pattern control.
- Fabrication and testing of a 16x8 meta-atom prototype.
Main Results:
- Demonstrated independent control of reflected and transmitted EM wave phases.
- Achieved dynamic control of transmissive and reflective patterns.
- Successfully implemented beamforming and beam focusing functionalities.
- Validated the metasurface's robust electromagnetic manipulating capabilities.
Conclusions:
- The proposed metasurface overcomes limitations of segregated control.
- It offers dynamic, full-space electromagnetic wave control in real-time.
- Potential applications in sensing and wireless communications are significant.
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