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<p>In this work, we present a photonic-aided THz over-the-air computation (OAC) system designed for ultra-high-throughput distributed computing. The system employs uni-traveling-carrier photodiodes (UTC-PDs) in sub-computing nodes (SCNs) for THz wave generation, and a Fermi-level managed barrier diode (FMBD) in the data fusion center (DFC) for THz signal detection. Photonic THz beam steering is implemented at the SCNs to enhance directional propagation and computation accuracy, while a frequency-division multiplexing (FDM)-like scheme is introduced to relax synchronization requirements among SCNs. We validate the feasibility of the proposed approach through a proof-of-concept experiment involving two SCNs operating at 0.5 Gbit/s in the 0.3 THz band, where successful implementation of analog addition was demonstrated. While the current system scale is limited, the results confirm the viability of photonic-aided THz OAC and its potential for integration of communication and computation in future 6G networks.</p>

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Photonics-aided THz over-the-air computation: a proof-of-concept experiment

  • 期刊论文

  • 发表日期：

    2026年7月13日

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  • Ming Che,
  • Hanwei Chen,
  • Takuya Yano,
  • Kazutoshi Kato

摘要

In this work, we present a photonic-aided THz over-the-air computation (OAC) system designed for ultra-high-throughput distributed computing. The system employs uni-traveling-carrier photodiodes (UTC-PDs) in sub-computing nodes (SCNs) for THz wave generation, and a Fermi-level managed barrier diode (FMBD) in the data fusion center (DFC) for THz signal detection. Photonic THz beam steering is implemented at the SCNs to enhance directional propagation and computation accuracy, while a frequency-division multiplexing (FDM)-like scheme is introduced to relax synchronization requirements among SCNs. We validate the feasibility of the proposed approach through a proof-of-concept experiment involving two SCNs operating at 0.5 Gbit/s in the 0.3 THz band, where successful implementation of analog addition was demonstrated. While the current system scale is limited, the results confirm the viability of photonic-aided THz OAC and its potential for integration of communication and computation in future 6G networks.