Plasmonic Multichannel Refractive Index Sensor Based on Subwavelength Tangent-Ring Metal–Insulator–Metal Waveguide

Guo, Zicong; Wen, Kunhua; Hu, Qinyang; Lai, Wenhui; Lin, Jiyan; Fang, Yihong

doi:10.3390/s18051348

Cited by 77 publications

(38 citation statements)

References 31 publications

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“…Independently adjusting the position of the resonance peaks can make the structure have a high suitability to different application, and the compact size is always desirable in the design of on-chip plasmonic structures. However, multiple resonance peaks generally mean more complex structure with hardly to obtain a highly independent tunability [24]. It is also a technical challenge to reduce the size of the structure under the premise of guaranteeing the performance [15].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Nanosensor Based on Independently Tunable Multiple Fano Resonances

Cheng¹,

Wang²,

He³

et al. 2019

Preprint

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A novel refractive index nanosensor with compound structures is proposed in this paper. It consists of three different kinds of resonators and two stubs which are side-coupled to a metal-dielectric-metal (MDM) waveguide. By utilizing numerical investigation with the finite element method (FEM), the simulation results show that the transmission spectrum of the nanosensor has as much as five sharp peaks of Fano resonance. Due to their different resonance mechanisms, each peak of resonances can be independently tuned by adjusting the corresponding parameters of the structure. In addition, the sensitivity of the nanosensor is up to , and it also has an excellent performance with a high group refractive index of . For the sake of different functions to practical applications, a legitimate combination of various different components, such as T-shaped, ring, and split-ring cavities, has been proposed to make the nanosensor dramatically reduce its dimensions without sacrificing performance. These designing concepts pave a new way to construct such compact on-chip plasmonic structures, and it can be widely applied to nanosensors, optical splitters, filters, optical switches, nonlinear photonic and slow-light devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Plasmonic Nanosensor Based on Independently Tunable Multiple Fano Resonances

Cheng¹,

Wang²,

He³

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…Independently adjusting the position of the resonance peaks can make the structure high suitability for different applications, and the compact size is always desirable in the design of on-chip plasmonic structures. However, multiple resonance peaks generally imply more complex structures resulting in difficulties in obtaining a highly independent tunability [24]. It is also a technical challenge to reduce the size of the structure while also guaranteeing high performance [15].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic nanosensor based on multiple independently tunable Fano resonances

Cheng¹,

Wang²,

He³

et al. 2019

Beilstein J. Nanotechnol.

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A novel refractive index nanosensor with compound structures is proposed in this paper. It consists of three different kinds of resonators and two stubs which are side-coupled to a metal–dielectric–metal (MDM) waveguide. By utilizing numerical investigation with the finite element method (FEM), the simulation results show that the transmission spectrum of the nanosensor has as many as five sharp Fano resonance peaks. Due to their different resonance mechanisms, each resonance peak can be independently tuned by adjusting the corresponding parameters of the structure. In addition, the sensitivity of the nanosensor is found to be up to 1900 nm/RIU. For practical application, a legitimate combination of various different components, such as T-shaped, ring, and split-ring cavities, has been proposed which dramatically reduces the nanosensor dimensions without sacrificing performance. These design concepts pave the way for the construction of compact on-chip plasmonic structures, which can be widely applied to nanosensors, optical splitters, filters, optical switches, nonlinear photonic and slow-light devices.

show abstract

“…Fano resonances have been obtained in MDMbased waveguide-cavity coupled systems [23,24]. In recent years, multiple Fano resonances have aroused interest [25][26][27]. Compared with a single Fano resonance, multiple Fano resonances have more versatile and flexible applications, such as self-reference and multichannel sensing [25,26].…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano resonances with flexible tunablity based on symmetry-breaking resonators

Ren

Ren²,

Zhang³

et al. 2019

Beilstein J. Nanotechnol.

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A symmetry-breaking nanostructure is proposed to achieve multiple Fano resonances. The nanostructure consists of an asymmetric ring resonator coupled to a plasmonic waveguide. The broken symmetry is introduced by deviating the centers of regular ring. New resonant modes that are not accessible through a regular symmetric ring cavity are excited. Thus, one asymmetric cavity can provide more than one resonant mode with the same mode order. As a result, the interval of Fano resonances is greatly reduced. By combining different rings with different degrees of asymmetry, multiple Fano resonances are generated. Those Fano resonances have different dependences on structural parameters due to their different physical origin. The resonance frequency and resonance peak number can be arbitrarily adjusted by changing the degree of asymmetry. This research may provide new opportunities to design on-chip optical devices with great tuning performance.

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Plasmonic Multichannel Refractive Index Sensor Based on Subwavelength Tangent-Ring Metal–Insulator–Metal Waveguide

Cited by 77 publications

References 31 publications

Plasmonic Nanosensor Based on Independently Tunable Multiple Fano Resonances

Plasmonic Nanosensor Based on Independently Tunable Multiple Fano Resonances

Plasmonic nanosensor based on multiple independently tunable Fano resonances

Multiple Fano resonances with flexible tunablity based on symmetry-breaking resonators

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