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A reconfigurable non-linear active metasurface for coherent wave down-conversion.
Pouria Sanjari1, Firooz Aflatouni2
1Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA.
Nature Communications
|February 26, 2025
Summary
This study introduces a novel non-linear active electronic-photonic metasurface. It efficiently transfers optical wave information to a steerable millimeter-wave beam for advanced wireless communication.
Area of Science:
- Metasurface technology
- Optoelectronics
- Wireless communication
Background:
- Metasurfaces offer versatile control over electromagnetic waves, enabling applications in antennas, cloaking, imaging, and communication.
- Non-linear and temporal metasurfaces extend functionality to frequency manipulation, crucial for advanced sensing and quantum systems.
Purpose of the Study:
- To demonstrate a non-linear active electronic-photonic metasurface capable of transferring information from optical waves to millimeter-wave beams.
- To showcase a proof-of-concept metasurface for steerable millimeter-wave beam generation and data transmission.
Main Methods:
- Integration of optically synchronized electronic-photonic chips on a printed circuit board with a microstrip patch antenna array.
- Utilizing microlenses for coupling modulated light (data-encoded mm-wave carrier) into electronic-photonic chips.
- On-chip detection, phase adjustment, and amplification of the mm-wave signal before routing to an antenna.
Main Results:
- Demonstration of a steerable 28 GHz millimeter-wave beam generated by optical illumination at 193 THz.
- Achieved beam-steering capabilities over a 60° range in both elevation and azimuth.
- Successful data transmission at 2 Gb/s over a fiber-wireless link.
Conclusions:
- The developed non-linear active electronic-photonic metasurface enables efficient optical-to-millimeter-wave information transfer.
- This technology facilitates steerable beam generation and high-speed data transmission, paving the way for integrated optical-wireless systems.
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