Related Experiment Video
Updated: Jul 31, 2025
09:33
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
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Complex-amplitude modulation of surface waves based on a metasurface coupler.
Optics Express
|May 9, 2023
Summary
This study introduces a metasurface coupler for flexible control over surface waves (SWs) amplitude and phase. This method enables arbitrary complex-amplitude modulation, paving the way for advanced optical meta-devices.
Area of Science:
- Photonics
- Plasmonics
- Metasurface technology
Background:
- Simultaneous and independent modulation of surface waves (SWs) amplitude and phase is crucial for photonics and plasmonics applications.
- Existing methods may have limitations in achieving full control over SW complex amplitude.
Purpose of the Study:
- To propose and demonstrate a novel method for flexible complex-amplitude modulation of SWs.
- To enable arbitrary control over both amplitude and initial phase of SWs.
Main Methods:
- Utilizing a metasurface coupler with meta-atoms capable of full-range complex-amplitude modulation.
- Converting incident waves into driven surface waves (DSWs) with desired amplitude and phase.
- Resonantly coupling DSWs to guided SWs in an adjacent dielectric waveguide.
Main Results:
- Demonstrated flexible complex-amplitude modulation of SWs.
- Successfully generated SW Airy beams and achieved SW dual focusing in the microwave regime.
- Verified the preservation of complex-amplitude modulation during the coupling process.
Conclusions:
- The proposed scheme offers a practical approach for freely tailoring SW wavefronts.
- The findings support the development of advanced surface optical meta-devices.
- This work has implications for future photonic and plasmonic integrated devices.
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