Tunable plasmon-induced transparency in graphene-based plasmonic waveguide for terahertz band-stop filters

Li, Meiping; Shi, Yanpeng; Liu, Xiaoyu; Song, Jinmei; Wang, Xiaodong; Yang, Fuhua

doi:10.1088/2040-8986/ac695f

Cited by 13 publications

(3 citation statements)

References 50 publications

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“…Metamaterials [1,2] are artificial and non-natural electromagnetic materials with specific electromagnetic properties. As the terahertz (THz) wave has a strong electromagnetic coupling effect on metamaterials and forms the electromagnetic resonance, THz metamaterials (TMMs) have been used to build a variety of devices, such as filters, [3,4] switches, [5,6] absorber, [7,8] polarization controller, [9] sensor, [10,11] etc. In particular, due to its the strong transmission for nonpolar medium and low photon energy properties, TMMs sensors have comprehensive application foreground and spread value in nondestructive testing and sensing field.…”

Section: Introductionmentioning

confidence: 99%

A High‐Q Terahertz Metamaterials Absorber for Refractive Index Sensing

Bai

Shen

Wang

et al. 2023

Physica Status Solidi (b)

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Herein, a high‐Q terahertz metamaterials perfect absorber is proposed. The absorption, physical mechanism, and refractive index sensing are investigated by using the finite element method. The results indicate that for B‐mode and D‐mode, the Q values are as high as 1160.41 and 1276.31, which are at least one order of magnitude higher than previously reported. The sensitivity S and the figure of merit (FOM) are 1078.00 GHz RIU−1, 170.03 and 518.00 GHz RIU−1, 75.29, respectively. It can be seen that the B‐mode is more suitable for sensing application than the D‐mode. The effective sensitivity Seff is presented to characterize the effect of the analyte thickness h on the sensing sensitivity. The study finds that the Seff of the B‐mode is greater than one when h is in the range of 9–10 μm, namely, the sensor has the highest sensitivity. In view of the aforementioned advantages, the proposed sensor has potential applications in nondestructive testing and biosensors.

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Section: Introductionmentioning

confidence: 99%

A High‐Q Terahertz Metamaterials Absorber for Refractive Index Sensing

Bai

Shen

Wang

et al. 2023

Physica Status Solidi (b)

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“…The Q value is about 1.85 and 1.52 at each state, respectively. Li et al fabricated a THz bandstop filter with switchable single/double plasma-induced transparency based on a metal-dielectric-metal waveguide, which was composed of a ring stub cavity and two graphene ribbons (GRs) on stub sidewalls [17]. The number of stopbands increases from one to two with the chemical potentials of GRs increasing from 0.2 to 0.8 eV.…”

Section: Introductionmentioning

confidence: 99%

High-Q terahertz bandstop filter via cuboid frame structure

Wang

et al. 2023

J. Micromech. Microeng.

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Terahertz (THZ) band stop filter can be used to filter interference signals in a filter pass band. The quality factor (Q) is the most important index to evaluate the transmission performance of filter. Usually, the high Q, the narrow bandwidth and the large slope of the stop band will promise the good filtering accuracy and transmission response. However, the Q value taken from metamaterial structures designed on the plane is always only in the single digit, resulting in less than satisfactory in filtering performance. Herein, a high Q terahertz band stop filter based on metamaterials was proposed. To fabricate this three-dimensional (3D) metamaterial structure, a microtopographic substrate guided method with feasible and high accuracy capacities was proposed. As a result, the device is measured to be in the filtering state in 1.038-1.102 THz while it is stopped in 1.062-1.066 THz. The similarity between the experimental and simulated transmission is up to 86.32%, indicating the fabricating method possesses a high accuracy. Accordingly, the Q value was calculated to be as high as 532. The band stop filter with this record Q value can be widely used in THZ detection, imaging and sensing in future. Meanwhile, the proposed fabrication method is effectively applied in 3D metamaterial and THZ device as well.

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“…One promising candidate for enabling active tuning of EIT effect in metasurfaces is by utilizing complex oxides (dielectrics, ferroelectrics, multiferroics) materials such as BiFeO 3 [21,22], SrTiO 3 [23,24], BaTiO 3 (BTO) [25][26][27][28], etc with tuneable electro-optic and nonlinear responses. These materials offer great prospects for establishing actively tuned metasurfaces [29].…”

Section: Introductionmentioning

confidence: 99%

Temperature tunable electromagnetically induced transparency in terahertz metasurface fabricated on ferroelectric platform

Devi¹,

Jana²,

Rane³

et al. 2022

J. Phys. D: Appl. Phys.

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The integration of active materials in terahertz (THz) metasurfaces is pivotal for the realization of functional device applications in diverse fields like sensing, imaging, communication, etc. In this context, ferroelectric materials endowed with tunable electro-optic properties have recently emerged as a novel candidate for achieving actively tuned THz metasurfaces. Here, we experimentally investigate temperature tuning of electromagnetically induced transparency (EIT) effects in a THz metasurface based on ferroelectric barium titanate (BaTiO3) thin film. We characterize tunable dielectric properties of the BTO thin film under variable temperatures (25 0C to 100 0C) at THz frequencies by utilizing THz time domain spectroscopy (THz-TDS) technique. Based on this aspect, we intelligently design a THz metasurface capable of displaying the EIT effect. THz transmissions through the metasurface sample are then probed for different applied temperatures. The EIT features undergo frequency shifts along with amplitude modulations owing to the temperature induced variations of the dielectric properties of the BTO thin film. A total red shift ~ 27 GHz in EIT resonance dip is observed experimentally as the temperature increases from 25oC to 100oC. Therefore, we demonstrate utilities of ferroelectric platform towards the development of temperature tunable EIT metasurfaces.

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Tunable plasmon-induced transparency in graphene-based plasmonic waveguide for terahertz band-stop filters

Cited by 13 publications

References 50 publications

A High‐Q Terahertz Metamaterials Absorber for Refractive Index Sensing

A High‐Q Terahertz Metamaterials Absorber for Refractive Index Sensing

High-Q terahertz bandstop filter via cuboid frame structure

Temperature tunable electromagnetically induced transparency in terahertz metasurface fabricated on ferroelectric platform

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