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<p>Nonlinear electron transport in extrinsically doped p–n diodes or junctions is used for rectification and wave mixing in electronic and optoelectronic applications. However, such rectifiers and mixers have fundamental limitations in terms of cut-off wavelength, frequency, sensitivity and working temperature due to thermal-voltage thresholds and transit-time limits. Here we report an all-in-one nonlinear Hall rectenna based on a type-II Weyl semimetal at room temperature. We use niobium iridium tetratelluride (NbIrTe<sub>4</sub>) and rely on the electromagnetic conversion abilities that arise from its band geometry and topology. With the system, we demonstrate a broadband frequency comb that exceeds the 27th order, subharmonic mixing at low power levels of –25 dBm, tuneable sideband bandwidth higher than 100 GHz and intermediate-frequency signals of over 27 GHz. Our approach offers nonlinear Hall rectification of photonic frequencies between 20 GHz and 820 GHz.</p>

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An all-in-one Hall rectenna with a bandwidth over 100 GHz

  • 期刊论文

  • 发表日期：

    2026年2月27日

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  • Zhen Hu,
  • Xiaokai Pan,
  • Raihan Ahammed,
  • Ziteng Zhang,
  • Fang Wang,
  • Bo Yin,
  • Libo Zhang,
  • Dong Wang,
  • Yingdong Wei,
  • Fucong Fei,
  • Zhijun Wang,
  • Lei Ye,
  • Xinglong Wu,
  • Fengqi Song,
  • Yang Xu,
  • Wei Lu,
  • Amit Agarwal,
  • Lin Wang,
  • Xiaoshuang Chen,
  • Weida Hu

摘要

Nonlinear electron transport in extrinsically doped p–n diodes or junctions is used for rectification and wave mixing in electronic and optoelectronic applications. However, such rectifiers and mixers have fundamental limitations in terms of cut-off wavelength, frequency, sensitivity and working temperature due to thermal-voltage thresholds and transit-time limits. Here we report an all-in-one nonlinear Hall rectenna based on a type-II Weyl semimetal at room temperature. We use niobium iridium tetratelluride (NbIrTe4) and rely on the electromagnetic conversion abilities that arise from its band geometry and topology. With the system, we demonstrate a broadband frequency comb that exceeds the 27th order, subharmonic mixing at low power levels of –25 dBm, tuneable sideband bandwidth higher than 100 GHz and intermediate-frequency signals of over 27 GHz. Our approach offers nonlinear Hall rectification of photonic frequencies between 20 GHz and 820 GHz.