Refractive index sensor based on Fano resonance in a ring with a rectangular cavity structure

Zhang, Xiaoyu; Yan, Shubin; Li, Tingsong; Liu, Pengwei; Zhang, Yi; Shen, Lifang; Ren, Yifeng; Hua, Ertian

doi:10.1016/j.rinp.2021.104997

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…The test samples Na + and K + are selected as the sensing materials to be filled into RCS and RC, respectively. The normal concentrations of Na + and K + in human serum range from 135 ∼ 145 mmol/L and 3.5 ∼ 5.5 mmol/L, respectively [37]. Figure 11(a) is based on the potential electrolytes' concentration ranges in the patient's blood, C Na + in the RCS is increased from 200 to 440 mg/dL with increments of 60 mg/dL.…”

Section: Application For Blood Electrolytes Detectionmentioning

confidence: 99%

MIM plasmonic sensors based on single-side ring cavity with one stub and their applications

Sun,

Qu,

et al. 2024

Phys. Scr.

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A plasmonic sensor is proposed, comprising a metal–insulator–metal (MIM) straight waveguide and a ring cavity with one stub (RCS). Using the finite element method, its transport properties are simulated and systematically analyzed. By optimizing the structure parameters, the sensor obtains the maximum sensitivity (S) of 2010 nm/RIU and the maximum figure of merit (FOM) of 49219.04 RIU-1. It demonstrates a sensing resolution (SR) of 4.98 × 10-7 RIU in the detection of refractive index variation. Based on the optimized parameters, temperature sensing is investigated utilizing Polydimethylsiloxane (PDMS) as the temperature-sensitive medium, and the temperature sensitivity is found to be -0.90 nm/℃. In addition, multiple independently tunable resonances are achieved by adding a ring cavity (RC) above the straight waveguide. This derived structure enables the simultaneous detection of electrolyte samples (Na+ and K+) in blood with bio-sensing sensitivities reaching 0.1833 nm·dL/mg and 0.2 nm·dL/mg. These results have directive significance for the development of multifunctional and ultra-compact plasmonic sensor.

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Section: Application For Blood Electrolytes Detectionmentioning

confidence: 99%

MIM plasmonic sensors based on single-side ring cavity with one stub and their applications

Sun,

Qu,

et al. 2024

Phys. Scr.

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“…A MIM structure has the advantages of providing deep sub-wavelength confinement of light and good balance between propagation length and loss, as well as ease of integration on a microchip 5 , 6 . Today, many plasmonic structures have been designed for a wide range of applications, including filters 7 – 9 , sensors 10 – 18 , demultiplexers 19 , 20 , switches 21 – 23 , logic gates 24 , etc. Although these structures can be realized using other techniques such as silicon photonic technology or photonic crystals, plasmonic structures occupy a much smaller area compared to the mentioned platforms 25 , 26 .…”

Section: Introductionmentioning

confidence: 99%

A single-mode tunable plasmonic sensor based on an 8-shaped resonator for cancer cell detection

Danaie,

Hajshahvaladi,

Ghaderpanah

2023

Sci Rep

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In this paper, a novel 8-shaped resonator coupled to metal–insulator–metal waveguides is used for designing plasmonic filters and sensors. The resonator supports two resonance modes, which result in peaks in the transmission spectrum of the structure. A Q-factor of 247.4 which can reach up to 270 at the wavelength of 1187.5 nm is observed. By placing vertical and horizontal metal blades in the resonator, two tunable single-mode plasmonic filters are obtained at the first and second resonance modes, respectively. The effect of structural parameters on the transmission spectrum is investigated using the finite-difference time-domain (FDTD) method. Based on the obtained results, the proposed plasmonic structure can be used for biosensing applications such as the detection of basal cancer cells with a sensitivity of 1200 nm/RIU. It is of great significance that both the sensitivity and Q-factor values for the proposed structure are higher than most recent sensors reported in the literature. Therefore, the proposed structure is a potentially promising candidate for filtering and sensing applications.

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“…SPPs, a mixed excited state, are caused by the local coordination of free electrons and photons [1]. And SPPs have been widely studied and paid attention to because they can break the diffraction limit of light at nanometer size and have powerful light field limiting and local field boosting capabilities [2]. Hence, SPPs are widely used in various optical integrated devices due to their unique characteristics, such as the photoelectric detector and refractive index sensor.…”

Section: Introductionmentioning

confidence: 99%

A High-Sensitivity Refractive Index Nano-Sensor Structure Based on MIM Waveguide

Liu

Yan

Shen

et al. 2023

J. Phys.: Conf. Ser.

Self Cite

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In this review, we engineer a high-performing nanosensor mechanic based on SPPs, which consists of a metal-insulator-metal waveguide coupled with two triangular plates in a double-internal-pile ring cavity (DISRC). The feasibility of establishing the sensor based on SPPs is analyzed theoretically, and the parameters of DISRC are simulated by the finite element method. The best sensitivity of the proposed system is 2640 nm/RIU with a high FOM is 71.4. The sensor is simple in structure, easy to integrate, and takes some advantages of traditional cavities into account. Hence, in other high-sensitivity nano-sensor fields, it has good application prospect and potential.

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Refractive index sensor based on Fano resonance in a ring with a rectangular cavity structure

Cited by 7 publications

References 23 publications

MIM plasmonic sensors based on single-side ring cavity with one stub and their applications

MIM plasmonic sensors based on single-side ring cavity with one stub and their applications

A single-mode tunable plasmonic sensor based on an 8-shaped resonator for cancer cell detection

A High-Sensitivity Refractive Index Nano-Sensor Structure Based on MIM Waveguide

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