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

Butt, Muhammad Ali; Kaźmierczak, Andrzej; Kazanskiy, Nikolay L.; Хонина, С. Н.

doi:10.3390/electronics10121419

Cited by 27 publications

(12 citation statements)

References 43 publications

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“…The default structural parameters, w, g, P, L, b, h, and d, are 50 nm, 10 nm, 100 nm, 650 nm, 100 nm, and 0 nm, respectively. The resonator size of the designed structure is compact and much smaller than previous designs (e.g., [77,78]). We marked the mode numbers in Figure 2.…”

Section: Resultsmentioning

confidence: 97%

Ultrahigh Sensitivity of a Plasmonic Pressure Sensor with a Compact Size

et al. 2021

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This study proposes a compact plasmonic metal-insulator-metal pressure sensor comprising a bus waveguide and a resonator, including one horizontal slot and several stubs. We calculate the transmittance spectrum and the electromagnetic field distribution using the finite element method. When the resonator’s top layer undergoes pressure, the resonance wavelength redshifts with increasing deformation, and their relation is nearly linear. The designed pressure sensor possesses the merits of ultrahigh sensitivity, multiple modes, and a simple structure. The maximum sensitivity and resonance wavelength shift can achieve 592.44 nm/MPa and 364 nm, respectively, which are the highest values to our knowledge. The obtained sensitivity shows 23.32 times compared to the highest one reported in the literature. The modeled design paves a promising path for applications in the nanophotonic field.

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Section: Resultsmentioning

confidence: 97%

Ultrahigh Sensitivity of a Plasmonic Pressure Sensor with a Compact Size

et al. 2021

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“…The influence of the bandwidth of localized SPR on the sensitivity can be expressed by the figure of merit. There are two definitions for calculating figure of merit, FOM and FOM* [61,73,74], i.e., FOM = S/FWHM, and FOM* = ∆T/T∆n, where T denotes the transmittance, and ∆T/∆n is the transmission change at a fixed wavelength induced by a refractive index change. We used the FOM because we clarify the optical properties based on FWHM.…”

Section: Structure Design and Simulation Methodsmentioning

confidence: 99%

“…Accordingly, in [49], elliptical-shaped resonators with two rectangular stubs coupled to MIM bus waveguide were used to obtain both Lorentzian resonance mode and Fano resonance mode. In addition, Salah E et al [61] designed a structure comprising an elliptical-like racetrack cavity, resulting in a refractive index sensitivity of 1400 nm/RIU. Furthermore, in [36], the authors proposed an elliptical-like structure coupled with a key-shaped resonant cavity, which yielded 1261 nm/RIU 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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“…In recent years, several types of plasmonic sensors, based on the metal-insulator-metal (MIM) or insulator-metal-insulator (IMI) con gurations, have been proposed and investigated [7][8][9]. The IMI structures support the well-known long-range SPPs (LRSPPs) waveguide modes with relatively low propagation loss, which in turn can improve the sensing accuracy [10].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Plasmonic Sensor with a Coupled Split-Square-Ring Resonator

2022

Preprint

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A novel design for a highly-sensitive plasmonic sensor, consisting of metal-insulator-metal (MIM) waveguide with a coupled split-square-ring resonator, is presented and studied by two-dimensional (2D) finite-difference time-domain (FDTD) method in this paper. The simulation results show that the proposed sensor possesses a refractive index (RI) sensitivity up to 2040 nm/RIU with optimized structural parameters. In addition, a temperature sensitivity of −1.2 nm/◦C is determined. Numerical calculations indicate that the sensing performance can still be further improved via optimization of the structure. The compact waveguide structure may find important applications in areas of sensing and integrated circuits.

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

Cited by 27 publications

References 43 publications

Ultrahigh Sensitivity of a Plasmonic Pressure Sensor with a Compact Size

Ultrahigh Sensitivity of a Plasmonic Pressure Sensor with a Compact Size

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

Highly Sensitive Plasmonic Sensor with a Coupled Split-Square-Ring Resonator

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