High sensitivity plasmonic refractive index sensing and its application for human blood group identification

Rakhshani, Mohammad Reza; Mansouri-Birjandi, Mohammad Ali

doi:10.1016/j.snb.2017.04.064

Cited by 180 publications

(35 citation statements)

References 31 publications

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“…It can be seen that the obtained value of normalized bandwidth is significantly larger than the best previous works. Providing a simple and robust structure, beside the possibility of easy fabrication exploiting CVD, nominates it as a promising structure to be utilized in plasmonic sensors such as biosensors, magnetic field sensors, imaging, and filtering applications …”

Section: Resultsmentioning

confidence: 99%

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Aghaee

Orouji

2019

Int J Numerical Modelling

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The realization of broadband absorption in the terahertz spectra is of significant interest in advanced terahertz applications. In this work, a novel ultrabroadband absorber based on the periodic array of graphene disks and graphene continues sheet is proposed. A developed transmission line theory besides the analytical circuit model of graphene disks and graphene continues sheet are exploited to describe the absorber structure by its circuit model. By using three graphene layers and considering impedance matching concept, the normalized bandwidth of 90% absorption is extended up to 121% of the central frequency. Also, the dependence of the absorption spectra on the structure parameters is investigated and analyzed. Moreover, the performance of the device under possible fabrication errors is discussed. In pursuit of evaluating the efficiency, accuracy, and validity of the proposed method, full-wave numerical modeling is performed by the finite element method. The results show that the proposed circuit approach, in addition to having advantages in terms of computing time and the need for memory resource, is in a good agreement with the full-wave simulations. Furthermore, the structure of the absorber is relatively simple, and it can be manufactured by chemical vapor deposition techniques.

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Section: Resultsmentioning

confidence: 99%

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Aghaee

Orouji

2019

Int J Numerical Modelling

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“…Besides, the refractive index of human blood can also influence temperature T (in the Kelvin unit) and the working wavelength λ (nm). As a result, Equation ( 6) can be denoted by [86]:…”

Section: Application For Detection Of Hemoglobin Concentrationmentioning

confidence: 99%

“…Besides, the refractive index of human blood can also influence temperature T (in the Kelvin unit) and the working wavelength λ (nm). As a result, Equation (6) can be denoted by [ 86 ]: n blood = n 0 + α C + β T + δλ + σλ 2 +γλ 3 where α , β , δ , σ , γ are Cauchy coefficients (constant values) that change with blood group. We show the importance of these coefficients in Table 3 .…”

Section: Application For Detection Of Hemoglobin Concentrationmentioning

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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“…P. Albella and co-workers proposed a tunable grating-based plasmonics sensor showing high sensitivity and controlled unidirectionality 56 . As reported in 55 , a silver nanorod array embedded into a square resonator was proposed and can apply for blood group identification. Also, M. R. Rakhshani et al introduced a nanorod array coupled with two slot cavities to detect glucose concentration in water 53 .…”

Section: Introductionmentioning

confidence: 99%

Significantly enhanced coupling effect and gap plasmon resonance in a MIM-cavity based sensing structure

Chau

Ming

Chao

et al. 2021

Sci Rep

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Herein, we design a high sensitivity with a multi-mode plasmonic sensor based on the square ring-shaped resonators containing silver nanorods together with a metal–insulator-metal bus waveguide. The finite element method can analyze the structure's transmittance properties and electromagnetic field distributions in detail. Results show that the coupling effect between the bus waveguide and the side-coupled resonator can enhance by generating gap plasmon resonance among the silver nanorods, increasing the cavity plasmon mode in the resonator. The suggested structure obtained a relatively high sensitivity and acceptable figure of merit and quality factor of about 2473 nm/RIU (refractive index unit), 34.18 1/RIU, and 56.35, respectively. Thus, the plasmonic sensor is ideal for lab-on-chip in gas and biochemical analysis and can significantly enhance the sensitivity by 177% compared to the regular one. Furthermore, the designed structure can apply in nanophotonic devices, and the range of the detected refractive index is suitable for gases and fluids (e.g., gas, isopropanol, optical oil, and glucose solution).

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High sensitivity plasmonic refractive index sensing and its application for human blood group identification

Cited by 180 publications

References 31 publications

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

Circuit modeling of ultra‐broadband terahertz absorber based on graphene array periodic disks

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

Significantly enhanced coupling effect and gap plasmon resonance in a MIM-cavity based sensing structure

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