High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Xiao, Gongli; Xu, Yingke; Yang, Hongyan; Ou, Zetao; Chen, Jianyun; Li, Haiou; Liu, Xingpeng; Zeng, Lang; Li, Jianqing

doi:10.3390/s21041164

Cited by 33 publications

(15 citation statements)

References 41 publications

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“…Surface plasmon polaritons (SPPs), which originate from the interaction of incident photons and free electrons on the metal surface, propagate along with the metal-dielectric interface and have the potential to overcome the light diffraction limit, localization of light in subwavelength, and high level of integration capability [1][2][3]. SPPs have applications in optical devices such as switches [4,5], sensors [6][7][8][9], integrated photonic devices [10], demultiplexers [11], and filters [12,13]. One of the greatly pledging waveguide structures is the metal-insulator-metal (MIM) waveguide, which has excesses such as low bending loss, simple structure, long propagation distance, deep sub-wavelength confinements, and easy integration [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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A Plasmonic Structure of Fano Resonance in the MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

Rohimah

Tian

Wang³

et al. 2022

Preprint

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A plasmonic structure of metal-insulator-metal (MIM) waveguide consisting of a single baffle waveguide and an r-shaped resonator is designed to produce Fano resonance. The finite element method uses the finite element method to analyze the transmission characteristics and magnetic field distributions of the plasmonic waveguide distributions. The simulation results exhibit two Fano resonances that can be achieved by the interference between a continuum state in the baffle waveguide and a discrete state in the r-shaped resonator. The Fano resonances can be simply tuned by changing geometrical parameters of the plasmonic structure. The value variations of geometrical parameters have different effects on sensitivity. Thus, the sensitivity of the plasmonic structure can achieve 1333 nm/RIU, with a figure of merit of 5876. The results of the designed plasmonic structure offer high sensitivity and nano-scale integration, which are beneficial to refractive index sensors, photonic devices at the chip nano-sensors, and biosensors applications.

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Section: Introductionmentioning

confidence: 99%

“…Fig 9. Sensitivities of the plasmonic structure on FR 1 and FR 2 for the different parameters at a the coupling distances g, b the baffle widths S, c the height of rectangular resonator H, and d the outer radius of the quarter-ring resonator R…”

mentioning

confidence: 99%

A Plasmonic Structure of Fano Resonance in the MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

Rohimah

Tian

Wang³

et al. 2022

Preprint

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“…In addition, SPPs can be used to transfer data in high-density photonic integrated circuits [14]. Metal-Insulator-Metal (MIM) waveguide coupled resonators have unique properties such as overcome the diffraction limit [15], high wavelength propagation range, simplicity of construction [16] and high ability to confine light at the scale below the wavelength. [17].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Refractive Index Sensor and Plasmonic Bandpass Filter Including Waveguide and Four Teeth Based On Fano Resonances

Najjari

Mirzanejhad

Ghadi

2022

Preprint

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A plasmonic refractive index sensor including a Metal-Insulator-Metal waveguide (MIM) with four teeth is proposed. Transmittance (T), Sensitivity (S) and Figure of Merit (FOM) investigated numerically and analysed via Finite Difference Time Domain method (FDTD). The simulation results show the generation of double Fano resonances in the system that the resonance wavelength and the resonance line-shapes can be adjusted by changing the geometry of the device. By optimizing the structure in the initial configuration, the maximum sensitivity of 1078nm/RIU and FOM of 3.62×105 is achieved. Then change the structure parameters. In this case, the maximum sensitivity and FOM are 1041nm/RIU and 2.94×104 respectively, thus two detection points can be used for the refractive index sensor. Due to proper performance and adjustable Fano resonance points, this structure is significant for fabricating sensitive refractive index sensor and plasmonic bandpass filter.

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“…If varying the original resonator can change the equivalent optical path of the Fabry-Perot cavity and influence the SPPs modes in the original resonator, which will excite new optical properties in the plasmonic sensor. Recently, several MIM waveguides with different patterns of resonators have been studied, such as circular/rectangular ring [47], bowtie shaped cavity [50], tooth-shaped cavity [51], X-shaped [52], U-shaped [53], B-shaped [54], T-type [55], M-type [56] and key-shaped [36] resonators, elliptical-shaped trapezoid cavity [57], all-grating racetrack cavity [58], stub coupled with a square cavity [54], metallic nanorods in hexagonal configuration [25], and so forth.…”

Section: Introductionmentioning

confidence: 99%

Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

et al. 2021

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This work proposed a multiple mode Fano resonance-based refractive index sensor with high sensitivity that is a rarely investigated structure. The designed device consists of a metal–insulator–metal (MIM) waveguide with two rectangular stubs side-coupled with an elliptical resonator embedded with an air path in the resonator and several metal defects set in the bus waveguide. We systematically studied three types of sensor structures employing the finite element method. Results show that the surface plasmon mode’s splitting is affected by the geometry of the sensor. We found that the transmittance dips and peaks can dramatically change by adding the dual air stubs, and the light–matter interaction can effectively enhance by embedding an air path in the resonator and the metal defects in the bus waveguide. The double air stubs and an air path contribute to the cavity plasmon resonance, and the metal defects facilitate the gap plasmon resonance in the proposed plasmonic sensor, resulting in remarkable characteristics compared with those of plasmonic sensors. The high sensitivity of 2600 nm/RIU and 1200 nm/RIU can simultaneously achieve in mode 1 and mode 2 of the proposed type 3 structure, which considerably raises the sensitivity by 216.67% for mode 1 and 133.33% for mode 2 compared to its regular counterpart, i.e., type 2 structure. The designed sensing structure can detect the material’s refractive index in a wide range of gas, liquids, and biomaterials (e.g., hemoglobin concentration).

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High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Cited by 33 publications

References 41 publications

A Plasmonic Structure of Fano Resonance in the MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

A Plasmonic Structure of Fano Resonance in the MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

Plasmonic Refractive Index Sensor and Plasmonic Bandpass Filter Including Waveguide and Four Teeth Based On Fano Resonances

Improved Refractive Index-Sensing Performance of Multimode Fano-Resonance-Based Metal-Insulator-Metal Nanostructures

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