Strain sensor based on terahertz spectral modulation of periodic circular hole array

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-06-12 DOI:10.1016/j.optlastec.2025.113374

Ruan Jiangtao , Tan Keyu , Wang Zhiyong

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Abstract

This paper proposes a simple, robust and low-cost strain sensor based on terahertz spectral modulation. The proposed sensor consists of an array of circular holes machined on a Polytetrafluoroethylene (PTFE) plate. Experimental measurements and numerical simulations validate the effectiveness of the proposed hole-array strain sensors. Firstly, the terahertz transmission spectrum of the sensors under unloaded condition was experimentally measured to determine their absorption characteristic. Further verification experiments were carried out to explore the modulation effect of strain on the terahertz transmission spectrum of the sensors. At last, using mechanics-electromagnetics coupling simulations, we modeled the modulation effect of strain on the terahertz transmission spectrum of the sensors to verify the experimental results. Consistent results from both experiments and simulations demonstrate that the periodic circular hole-array structure generates a characteristic absorption dip in the transmission spectrum, and that the applied strain causes an approximately linear shift in the position of this dip.

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基于太赫兹频谱调制周期圆孔阵列的应变传感器

本文提出了一种基于太赫兹频谱调制的简单、鲁棒、低成本应变传感器。所提出的传感器由一组加工在聚四氟乙烯（PTFE）板上的圆孔组成。实验测量和数值模拟验证了所提出的孔阵列应变传感器的有效性。首先，实验测量了传感器在空载状态下的太赫兹透射谱，确定了传感器的吸收特性。进一步进行验证实验，探讨应变对传感器太赫兹传输频谱的调制作用。最后，通过力学-电磁耦合仿真，模拟了应变对传感器太赫兹传输谱的调制效应，验证了实验结果。实验和模拟结果一致表明，周期性圆孔阵列结构在透射光谱中产生特征吸收倾角，外加应变导致该倾角的位置近似线性移动。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems