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Large area crystalline Weyl semimetal with nano Au film based micro-fold line array for THz detector

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Abstract

The advancement of 6G technology relies on the development of high-performance terahertz detectors that can operate at room temperature. These detectors are crucial for Internet of Things (IoT) applications, which require sensitive environmental sensing and efficient reception of 6G signals. One significant research focus is on detection technology with high responsiveness and low equivalent noise power for 6G signals, which experience high losses in the air. To meet the demand for ultra-sensitive detectors in 6G technology, we have employed several techniques. Firstly, we prepared a large area of Weyl-semimetal layer through magnetron sputtering. Secondly, we obtained a high-quality Weyl-semimetal active layer by carefully controlling the annealing conditions. Next, a thin nano-Au layer was introduced as a micro-cavity reflection layer to enhance the device’s detection rate. Additionally, we incorporated an electromagnetic induction well to improve carrier confinement and enhance the detection sensitivity. This proposed high-performance terahertz detector, with its potential for industrial production, offers a valuable technical solution for the advancement of 6G technology.

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Authors and Affiliations

  1. Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng, 252059, China

    Qi Song & BingYuan Zhang

  2. North China Institute of Computing Technology, Beijing, 100083, China

    Yu Zhou

  3. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, China

    JiaTong Wang & Min Zhang

  4. School of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, 300072, China

    ErSe Jia

Authors
  1. Qi Song
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  2. Yu Zhou
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  3. ErSe Jia
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  4. JiaTong Wang
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  5. Min Zhang
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  6. BingYuan Zhang
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Corresponding authors

Correspondence to Yu Zhou, Min Zhang or BingYuan Zhang.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant No. 12104314) and the Key Laboratory of Optoelectronic Devices Systems of Ministry of Education and Guangdong Province and Research Foundation of Liaocheng University (Grant No. 318052316).

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Song, Q., Zhou, Y., Jia, E. et al. Large area crystalline Weyl semimetal with nano Au film based micro-fold line array for THz detector. Sci. China Technol. Sci. 66, 3267–3275 (2023). https://doi.org/10.1007/s11431-023-2478-0

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  • DOI: https://doi.org/10.1007/s11431-023-2478-0

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