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<p>Wireless data traffic has grown at an unprecedented rate, creating an urgent need for innovative solutions to overcome current technological limitations. Sub-terahertz (sub-THz) carrier frequencies offer increased capacity and low attenuation for short-range wireless applications. Here, we demonstrate sub-THz receivers based on graphene, which offer several advantages over state-of-the-art sub-THz receivers, such as a direct detection scheme, passive operation, and compactness. We exploit multiple concepts incorporated into a single device, including a high-quality sub-THz cavity placed in the vicinity of a high-mobility graphene channel to overcome its intrinsically low absorption. The graphene receivers achieve a multigigabit-per-second data rate with a maximum distance of &#xa0;~&#xa0;3 m from the transmitter. We demonstrate a trade-off between bandwidth and responsivity: a setup-limited 40 GHz bandwidth in low-responsivity devices, and a maximum responsivity of 0.16 A/W in devices with a 2 GHz bandwidth. Our findings enable applications such as chip-to-chip communication and close-proximity device-to-device communication.</p>

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High-speed graphene-based sub-terahertz receivers enabling wireless communications for 6G and beyond

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月25日

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  • Karuppasamy Pandian Soundarapandian,
  • Sebastián Castilla,
  • Stefan M. Koepfli,
  • Simone Marconi,
  • Laurenz Kulmer,
  • Ioannis Vangelidis,
  • Ronny de la Bastida,
  • Enzo Rongione,
  • Bernat Terrés,
  • Seth Ariel Tongay,
  • Kenji Watanabe,
  • Takashi Taniguchi,
  • Elefterios Lidorikis,
  • Klaas-Jan Tielrooij,
  • Juerg Leuthold,
  • Frank H. L. Koppens

摘要

Wireless data traffic has grown at an unprecedented rate, creating an urgent need for innovative solutions to overcome current technological limitations. Sub-terahertz (sub-THz) carrier frequencies offer increased capacity and low attenuation for short-range wireless applications. Here, we demonstrate sub-THz receivers based on graphene, which offer several advantages over state-of-the-art sub-THz receivers, such as a direct detection scheme, passive operation, and compactness. We exploit multiple concepts incorporated into a single device, including a high-quality sub-THz cavity placed in the vicinity of a high-mobility graphene channel to overcome its intrinsically low absorption. The graphene receivers achieve a multigigabit-per-second data rate with a maximum distance of  ~ 3 m from the transmitter. We demonstrate a trade-off between bandwidth and responsivity: a setup-limited 40 GHz bandwidth in low-responsivity devices, and a maximum responsivity of 0.16 A/W in devices with a 2 GHz bandwidth. Our findings enable applications such as chip-to-chip communication and close-proximity device-to-device communication.