Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education, Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Physics, Beijing Institute of Technology, Beijing, 100081, China.
School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, 100081, China.
Adv Sci (Weinh). 2023 Jul;10(19):e2301128. doi: 10.1002/advs.202301128. Epub 2023 Apr 25.
Electronic sensors play important roles in various applications, such as industry and environmental monitoring, biomedical sample ingredient analysis, wireless networks and so on. However, the sensitivity and robustness of current schemes are often limited by the low quality-factors of resonators and fabrication disorders. Hence, exploring new mechanisms of the electronic sensor with a high-level sensitivity and a strong robustness is of great significance. Here, a new way to design electronic sensors with superior performances based on exotic properties of non-Hermitian topological physics is proposed. Owing to the extreme boundary-sensitivity of non-Hermitian topological zero modes, the frequency shift induced by boundary perturbations can show an exponential growth trend with respect to the size of non-Hermitian topolectrical circuit sensors. Moreover, such an exponential growth sensitivity is also robust against disorders of circuit elements. Using designed non-Hermitian topolectrical circuit sensors, the ultrasensitive identification of the distance, rotation angle, and liquid level is further experimentally verified with the designed capacitive devices. The proposed non-Hermitian topolectrical circuit sensors can possess a wide range of applications in ultrasensitive environmental monitoring and show an exciting prospect for next-generation sensing technologies.
电子传感器在各种应用中发挥着重要作用，例如工业和环境监测、生物医学样本成分分析、无线网络等。然而，当前方案的灵敏度和鲁棒性通常受到低品质因数谐振器和制造障碍的限制。因此，探索具有高水平灵敏度和强鲁棒性的新型电子传感器机制具有重要意义。在这里，提出了一种基于非厄米拓扑物理奇异性质来设计具有卓越性能的电子传感器的新方法。由于非厄米拓扑零模的极端边界灵敏度，边界扰动引起的频率位移相对于非厄米拓扑电路传感器的尺寸表现出指数增长趋势。此外，这种指数增长的灵敏度也对电路元件的失调具有鲁棒性。利用设计的非厄米拓扑电路传感器，通过设计的电容器件进一步实验验证了距离、旋转角度和液位的超灵敏识别。所提出的非厄米拓扑电路传感器在超灵敏环境监测方面具有广泛的应用前景，为下一代传感技术展示了令人兴奋的前景。
