Tunable infrared wide band-stop plasmonic filter using T-shaped resonators

Kamari, Mehdi; Hayati, Mohsen; Khosravi, Saba

doi:10.1016/j.mssp.2021.105983

Cited by 21 publications

(5 citation statements)

References 30 publications

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“…294,295 It typically consists of a dielectric or metallic film with subwavelength thickness artificial nanostructures. Furthermore, plasmonic devices can be designed in various ways in terms of multi-materials, complex geometries, and the combination of both, which enable a variety of functions such as optical filters, 296 refractive index sensors, 297 and re-configurable absorbers. 298 After the analyte material is added or spread across the functionalized surface, the interaction affects the overall spectrum to realize the applications in communications, 299 solar cells, 300 gas sensors, 301 biological and chemical related sensors 302 among many other fields.…”

Section: Sensing Strategies (1) Colorimetric-based Detectionmentioning

confidence: 99%

Micro- and nanosystems for the detection of hemorrhagic fever viruses

Bao,

Waitkus,

Liu

et al. 2023

Lab Chip

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Section: Sensing Strategies (1) Colorimetric-based Detectionmentioning

confidence: 99%

Micro- and nanosystems for the detection of hemorrhagic fever viruses

Bao,

Waitkus,

Liu

et al. 2023

Lab Chip

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“…The range of the filtered wavelengths The bangap width Dimensions Resonator forma Metal [42] [ λ 1 = 850 nm-λ 2 = 1190 nm] 340 nm x = 3260 nm,y = 370 nm Trapezoidal-shaped Ag [37] [ λ 1 = 850 nm-λ 2 = 1300 nm] 450 nm x = 275 nm,y = 225 nm T-shaped Ag [31] [ λ 1 = 1350 nm-λ 2 = 1900 nm] 550 nm x = 500 nm,y = 400 nm Teeth-shaped Ag [43] [ λ 1 = 1280 nm-λ 2 = 2250 nm] 970 nm x = 1635 nm,y = 360 nm T-shaped Ag This study…”

Section: Referencesmentioning

confidence: 99%

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

et al. 2023

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In this study, we propose an ultra-wideband bandstop filter (UWB-BSF) using a plasmonic MIM waveguide coupled with a stub cavity that is investigated using finite-difference time-domain (FDTD). Air and silver are used as insulators and metals, respectively; silver is characterized by the Drude model. The structure can filter the optical telecommunication wavelengths of 1550 nm and 1310 nm. The transmission peak and the resonance wavelength of the basic structure can be tuned by varying the stub resonator’s length and width. In order to improve the filtering function of the bandstop filter at broad bandwidth in the NIR region with maximum transmission peak, the number of stub resonators is increased to two, three, and four stubs with properly studied lengths and a proper horizontal distance between each two stubs. The bandwidth is enhanced from 350 nm, with two stubs, to 620nm, with three stubs, and 770 nm, with four stubs, respectively. The corresponding filtered wavelength ranges are [1600nm-1950nm], [1330nm-1950nm] and [1180nm-1950nm] respectively. Moreover, with the increase in the number of stubs, the center wavelength achieves a blue shift to lower wavelengths. Further, the paper provides significant applications for plasmonic bandstop filters in highly integrated optical circuits.

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“…Here, we show that a very simple plasmonic T-shaped cavity can produce BICs as well as PIT resonances with sensing applications. Although a T-cavity has been proposed in plasmonics for studying PIT resonances in simple [54] and periodic [55] nanodevices, to our knowledge, there is no study about FW-BICs in such a cavity with an application for sensing in the infrared domain. In this work, we analytically and numerically show the presence of FW-BIC in a T-shaped cavity made up of a stub of length d 0 and two lateral branches of lengths d 1 and d 2 (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Bound States in the Continuum and Induced Resonances in a Simple Plasmonic Waveguide with Sensing Application

Rezzouk,

Khattou,

Amrani

et al. 2023

Photonics

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A Friedrich–Wintgen bound state in the continuum (FW-BIC) is of particular interest in the field of wave physics phenomena. It is induced via the destructive interference of two modes that belong to the same cavity. In this work, we analytically and numerically show the existence of FW-BIC in a T-shaped cavity composed of a stub of length d0 and two lateral branches of lengths d1 and d2, attached to an infinite waveguide. The whole system consists of metal–insulator–metal (MIM) plasmonic waveguides that operate in the telecommunication range. Theoretically, when d1 and d2 are commensurated, BIC is induced by these two branches. This latter is independent of d0 and the infinite waveguide, where the T structure is grafted. By breaking the BIC condition, we obtain a plasmon-induced transparency (PIT) resonance. The PIT resonance’s sensitivity to the dielectric material of the waveguide may be exploited to design a sensitive nanosensor suitable for sensing platforms, thanks to its very small footprint. A sensitivity of 1400 nm/RIU and a resolution of 1.86×10−2 RIU showed a high level of performance that the designed structure achieved. Moreover, this structure could also be used as a biosensor, in which we have studied the detection of the concentration in the human body, such as Na+, K+, and glucose solutions, and these sensitivities can reach 0.21, 0.28, and 1.74 nm dL/mg, respectively. Our designed structure advances with technology and has good application prospects, working as a biosensor to detect the blood’s hemoglobin level. The analytical results, obtained via Green’s function method, are validated via numerical simulations using Comsol Multiphysics software based on the finite element method.

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Tunable infrared wide band-stop plasmonic filter using T-shaped resonators

Cited by 21 publications

References 30 publications

Micro- and nanosystems for the detection of hemorrhagic fever viruses

Micro- and nanosystems for the detection of hemorrhagic fever viruses

Ultra wideband bandstop plasmonic filter in the NIR region based on stub resonators

Bound States in the Continuum and Induced Resonances in a Simple Plasmonic Waveguide with Sensing Application

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