Optical properties of MIM plasmonic waveguide with an elliptical cavity resonator

Haffar, Rida El; Farkhsi, Abdelkrim; Mahboub, O.

doi:10.1007/s00339-020-03660-w

Cited by 39 publications

(19 citation statements)

References 37 publications

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“…Simulations were performed by a 2D FEM using the commercial software COMSOL Multiphysics (Version 5.2a, Stockholm, Sweden) [ 60 ] with perfectly matched layer absorbing boundary conditions to absorb the outgoing waves (to make sure that the light that is propagating out of the modeling domain does not get reflected). Note that a three-dimensional (3D) model is reduced to a 2D one since both models will obtain the similar results in simulations [ 49 , 61 , 62 ] and experiments [ 63 , 64 ], provided that the device height or thickness in the z-direction is much longer than in the x- and y- directions [ 52 , 65 ]. Therefore, we can ignore the effect of the device’s height on the obtained results by supposing that the device height is infinite [ 51 ].…”

Section: Structure Design and Simulation Methodsmentioning

confidence: 99%

“…The resonance cavity in a MIM plasmonic waveguide system with different structural aspects plays a crucial role to form the SPPs modes in the resonance cavity. Various resonance cavities in plasmonic MIM waveguide using single or multiple cavities have theoretically analyzed and numerically investigated [ 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. Many efforts have focused on enlarging the cavity size to achieve high sensitivity as the effective cavity length has a linear relationship to the increased resonance wavelength [ 20 , 37 , 53 ].…”

Section: Introductionmentioning

confidence: 99%

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Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

et al. 2020

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A plasmonic metal-insulator-metal waveguide filter consisting of one rectangular cavity and three silver baffles is numerically investigated using the finite element method and theoretically described by the cavity resonance mode theory. The proposed structure shows a simple shape with a small number of structural parameters that can function as a plasmonic sensor with a filter property, high sensitivity and figure of merit, and wide bandgap. Simulation results demonstrate that a cavity with three silver baffles could significantly affect the resonance condition and remarkably enhance the sensor performance compared to its counterpart without baffles. The calculated sensitivity (S) and figure of merit (FOM) in the first mode can reach 3300.00 nm/RIU and 170.00 RIU−1. Besides, S and FOM values can simultaneously get above 2000.00 nm/RIU and 110.00 RIU−1 in the first and second modes by varying a broad range of the structural parameters, which are not attainable in the reported literature. The proposed structure can realize multiple modes operating in a wide wavelength range, which may have potential applications in the on-chip plasmonic sensor, filter, and other optical integrated circuits.

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Section: Structure Design and Simulation Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

et al. 2020

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“…The enhancement of the device performance is revealed due to the modification in the cavity design because of improved light-matter interaction. The advantages of the circular [43], rectangular [42], and ellipse [41] cavities are combined in the racetrack cavity. The best choice is to use a circular cavity.…”

Section: Device Designmentioning

confidence: 99%

Metal-Insulator-Metal Waveguide-Based Racetrack Integrated Circular Cavity for Refractive Index Sensing Application

Butt¹,

Kaźmierczak²,

Kazanskiy³

et al. 2021

Preprint

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Herein, a novel cavity design of racetrack integrated circular cavity established on metal-insulator-metal (MIM) waveguide is suggested for refractive index sensing application. Over the past few years, we have witnessed several unique cavity designs to improve the sensing performance of the plasmonic sensors created on the MIM waveguide. The optimized cavity design can provide the best sensing performance. In this work, we have numerically analyzed the device design by utilizing the finite element method (FEM). The small variations in the geometric parameter of the device can bring a significant shift in the sensitivity and FOM of the device. The best sensitivity and FOM of the anticipated device are 1400 nm/RIU and ~12.01, respectively. We believe that the sensor design analyzed in this work can be utilized in the on-chip detection of biochemical analytes.

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“…For example, in [48], the authors employed an elliptical resonator with a silicon strip layer to obtain a high Q-factor and a sensitivity of 550 nm/RIU. In [59], the authors used a half-elliptical groove and an elliptical cavity resonator and achieved the transmission and group index of 90% and 63. On the other hand, Zafar et al [60] proposed a sensor based on the double elliptical ring resonators with an 1100 nm/RIU-sensing sensitivity.…”

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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Optical properties of MIM plasmonic waveguide with an elliptical cavity resonator

Cited by 39 publications

References 37 publications

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

Metal-Insulator-Metal Waveguide-Based Racetrack Integrated Circular Cavity for Refractive Index Sensing Application

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

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