What is it about?
Recently, Professor Si Liming's research group from the School of Integrated Circuits and Electronics at the Beijing Institute of Technology has made significant progress in the intelligent electromagnetic control of space-time-coding vortex wave metasurfaces. The group has proposed a theory and technology for spacetime-coded vortex wave metasurfaces, which can effectively realize dynamic and intelligent electromagnetic control of the multiplexing and power allocation of orbital angular momentum (OAM) modes of vortex beams. The related results have been published titled "Dynamic Generation of Multiplexed Vortex Beams by a Space-Time-Coding Metasurface" in the renowned international journal Photonics Research.
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Why is it important?
We have developed a novel space-time-coding metasurface that can dynamically generate and control multiplexed vortex beams with arbitrary customized mode composition and power distribution. Unlike conventional metasurfaces, our approach enables real-time adjustment of the beam properties. Experimental results demonstrate the high purity and flexibility of the generated vortex beams, opening up new possibilities for applications in multi-modal multiplexed communication and advanced sensing systems.
Perspectives
We propose a novel space-time-coding metasurface theory and technology for dynamic and intelligent electromagnetic control of multiplexed vortex beams, enabling efficient multiplexing and power allocation of orbital angular momentum (OAM) modes. This approach allows for dynamic adjustment of the OAM mode composition and power distribution of the generated multiplexed vortex beams without altering the physical structure or input excitation. The proposed method can be effectively extended to terahertz, infrared, and optical frequency bands, demonstrating the significant potential for applications in multi-modal multiplexed communication, radar, and sensing systems.
Prof. Liming Si
Beijing Institute of Technology
Read the Original
This page is a summary of: Dynamic generation of multiplexed vortex beams by a space-time-coding metasurface, Photonics Research, December 2024, Optical Society of America (OSA),
DOI: 10.1364/prj.543744.
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