Design and experimental realization of triple-band electromagnetically induced transparency terahertz metamaterials employing two big-bright modes for sensing applications

Wang, Ben-Xin; Duan, Guiyuan; Lv, Wangze; Tao, Yi; Xiong, Han; Zhang, Dong-Qin; Yang, Guofeng; Shu, Fang-Zhou

doi:10.1039/d3nr05095e

Cited by 96 publications

(10 citation statements)

References 60 publications

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“…Due to the narrow transparency window and strong local fields, EIT−like metasurface proves to be an ideal platform for detecting small changes in the surrounding media environment. Electromagnetically induced transparency also causes a large change in the transmission phase of electromagnetic waves through the transmission window created by the designed metamaterials and an increase in the group delay, leading to slow light properties, which can enhance some of the nonlinear effects [26,27]. The spectral response of EIT−like metasurfaces has been experimentally verified in the microwave, terahertz, and optical frequency ranges [28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 94%

Highly Sensitive Qualitative and Quantitative Identification of Cashmere and Wool Based on Terahertz Electromagnetically Induced Transparent Metasurface Biosensor

Luo,

Xu,

Jia

et al. 2024

Biosensors

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Cashmere and wool are both natural animal fibers used in the textile industry, but cashmere is of superior quality, is rarer, and more precious. It is therefore important to distinguish the two fibers accurately and effectively. However, challenges due to their similar appearance, morphology, and physical and chemical properties remain. Herein, a terahertz electromagnetic inductive transparency (EIT) metasurface biosensor is introduced for qualitative and quantitative identification of cashmere and wool. The periodic unit structure of the metasurface consists of four rotationally symmetric resonators and two cross−arranged metal secants to form toroidal dipoles and electric dipoles, respectively, so that its effective sensing area can be greatly improved by 1075% compared to the traditional dipole mode, and the sensitivity will be up to 342 GHz/RIU. The amplitude and frequency shift changes of the terahertz transmission spectra caused by the different refractive indices of cashmere/wool can achieve highly sensitive label−free qualitative and quantitative identification of both. The experimental results show that the terahertz metasurface biosensor can work at a concentration of 0.02 mg/mL. It provides a new way to achieve high sensitivity, precision, and trace detection of cashmere/wool, and would be a valuable application for the cashmere industry.

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Section: Introductionmentioning

confidence: 94%

Highly Sensitive Qualitative and Quantitative Identification of Cashmere and Wool Based on Terahertz Electromagnetically Induced Transparent Metasurface Biosensor

Luo,

Xu,

Jia

et al. 2024

Biosensors

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“…Repeating these steps can prepare the second L-shaped structure. Consequently, the present structure in our scheme is achievable with the current technologies according to the reports in [47,58].…”

Section: Stability Analysis and Advantagesmentioning

confidence: 99%

A versatile meta-device for linearly polarized waves in terahertz region

Lv,

Xu,

Yin

et al. 2024

Phys. Scr.

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A device constructed from metamaterials is proposed, which makes asymmetric transmission and reflection achieved in addition to a perfect dual-band unidirectional reflectionlessness at THz frequencies for linearly polarized incident waves. Owing to the unique structural characteristics, it exhibits an excellent performance of converting linear to circular polarization at multiple frequencies. Moreover, the maximum of polarization conversion ratio reaches 99.94%, and the ellipticity approaches 1 at eight frequencies. Additionally, UR and AT achieve functionality within broad ranges of the incidence angle $\theta$ and distance d between two resonators. The utilization of the metamaterial design will facilitate the multifunctionality in THz regions and promote the further advancements in integrated processes, communication, radar and other fields.

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“…VO 2 , on the other hand, is an important phase change material that can undergo a lattice structure transformation under temperature control, leading to a macroscopic change from a dielectric state to a metallic state [33][34][35][36]. The phase transition of VO 2 is reversible, allowing for the design of temperature-controlled optical devices [35][36][37][38][39][40][41][42]. Notably, VO 2 has been utilized in the development of tunable devices such as smart windows [43,44].…”

Section: Introductionmentioning

confidence: 99%

Multi-functional metasurface: ultra-wideband/multi-band absorption switching by adjusting guided-mode resonance and local surface plasmon resonance effects

Li,

Cheng,

Zhang

et al. 2024

Commun. Theor. Phys.

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This study introduces an innovative dual-tunable absorption film with the capability to switch between ultra-wideband and narrowband absorption. By manipulating the temperature, the film can achieve multi-band absorption within the 30-45 THz range or ultra-wideband absorption spanning 30-130 THz, with an absorption rate exceeding 0.9. Furthermore, the structural parameters of the absorption film are optimized using the particle swarm optimization (PSO) algorithm to ensure optimal absorption response. The absorption response of the film is primarily attributed to the coupling of guided mode resonance and local surface plasmon resonance effects. The film's symmetric structure enables polarization incoherence and allows for tuning through various means such as doping/voltage, temperature, and structural parameters. In the case of multi-band absorption response, the film exhibits good sensitivity to refractive index changes in multiple absorption modes. Additionally, the absorption spectrum of the film remains effective even at large incidence angles, making it highly promising for applications in fields like biosensing and infrared stealth.

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Design and experimental realization of triple-band electromagnetically induced transparency terahertz metamaterials employing two big-bright modes for sensing applications

Abstract: Multi-band electromagnetically induced transparency (EIT) effects have attracted widespread attention due to their great application prospects. However, their realization is mainly based on the coupling of multiple sub-resonators that typically...

Cited by 96 publications

References 60 publications

Highly Sensitive Qualitative and Quantitative Identification of Cashmere and Wool Based on Terahertz Electromagnetically Induced Transparent Metasurface Biosensor

Highly Sensitive Qualitative and Quantitative Identification of Cashmere and Wool Based on Terahertz Electromagnetically Induced Transparent Metasurface Biosensor

A versatile meta-device for linearly polarized waves in terahertz region

Multi-functional metasurface: ultra-wideband/multi-band absorption switching by adjusting guided-mode resonance and local surface plasmon resonance effects

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