Ultra-High Sensitivity Nanosensor Based on Multiple Fano Resonance in the MIM Coupled Plasmonic Resonator

Zhao, Tonggang; Yu, Shilin

doi:10.1007/s11468-017-0610-5

Cited by 38 publications

(28 citation statements)

References 29 publications

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“…Due to the interference of continuous(bright) modes and discrete(dark) modes, Fano resonance exhibits the sharp asymmetric line shape characteristic [7], which has attracted more and more attention. The common design methods of these structures can be generally divided into three categories -First is that the input and output waveguides are direct coupled to both ends of the resonator [3,[8][9][10], second is that the resonators are side coupled to one waveguide between the input and output ports [11][12][13][14][15], and third is that the input waveguide, output waveguide and resonators are all coupled through a gap [2,16,17]. The common resonators are rectangular [6], ring [14], triangular [9], disk [18,19], hexagonal [20] and other special shapes.…”

Section: Introductionmentioning

confidence: 99%

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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.

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Section: Introductionmentioning

confidence: 99%

“…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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show abstract

“…Due to the interference of continuous (bright) modes and discrete (dark) modes, the Fano resonance exhibits a sharp asymmetric line shape characteristic [7], which has attracted more and more attention. The common design methods of these structures can be generally divided into three categories -First is that the input and output waveguides are direct coupled to both ends of the resonator [3,[8][9][10], second is that the resonators are side-coupled to one waveguide between the input and output ports [11][12][13][14][15], and third is that the input waveguide, output waveguide and resonators are all coupled through a gap [2,16,17]. The common resonators are rectangular [6], ring [14], triangular [9], disk [18,19], hexagonal [20] and other special shapes.…”

Section: Introductionmentioning

confidence: 99%

“…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.

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“…In MIM plasmonic structures, Fano resonances are usually realized following the classical pattern, i.e., two or three different resonators are employed, one of which effectively creates bright mode, and the other(s) dark mode(s) [ 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. There are also structures whose Fano response is based on phase-coupling between two detuned modes of different resonators [ 29 , 30 , 31 ], interaction between the modes of two identical resonators [ 32 , 33 ], or between different modes of the same resonator [ 34 , 35 ].…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano-Like MIM Plasmonic Structure Based on Triangular Resonator for Refractive Index Sensing

Janković

2018

Sensors

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In this paper, we present a Fano metal-insulator-metal (MIM) structure based on an isosceles triangular cavity resonator for refractive index sensing applications. Due to the specific feeding scheme and asymmetry introduced in the triangular cavity, the resonator exhibits four sharp Fano-like resonances. The behavior of the structure is analyzed in detail and its sensing capabilities demonstrated through the responses for various refractive indices. The results show that the sensor has very good sensitivity and maximal figure of merit (FOM) value of 3.2 × 105. In comparison to other similar sensors, the proposed one has comparable sensitivity and significantly higher FOM, which clearly demonstrates its high sensing potential.

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Ultra-High Sensitivity Nanosensor Based on Multiple Fano Resonance in the MIM Coupled Plasmonic Resonator

Cited by 38 publications

References 29 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-Like MIM Plasmonic Structure Based on Triangular Resonator for Refractive Index Sensing

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