High sensitivity metal-insulator-metal sensor based on ring-hexagonal resonator with a couple of square cavities connected

Aghaei, Fatemeh; Bahador, Hamid

doi:10.1088/1402-4896/ac6f29

Cited by 17 publications

(4 citation statements)

References 84 publications

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“…First, the structure of the MIM bus waveguide coupled to the air ring hexagonal resonator (case 1) is investigated, as shown in figure 3(a). All geometrical values given in table 1 have been optimized using the trial-and-error method [25,35,44]. The optimization process for several parameters is discussed in detail below.…”

Section: Simulation and Resultsmentioning

confidence: 99%

“…Recently, SPPs waves have had various applications in optical devices, e.g., modulators [10,11], tweezers [12], filters [13], absorbers [14], amplifiers [15], solar cells [16], and sensors [17], due to its benefit of conquering the diffraction limit and localization of light within Nano-scale [18][19][20]. Among these devices, sensors based on metalinsulator-metal (MIM) waveguides have become the most promising structure [21,22], in consequence of their deep-subwavelength confinement of light, easier fabrication, and longer propagation length [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of cavity plasmon resonance in high-sensitivity MIM nanostructure with rectangular air stubs inside the hexagonal-ring resonator

Keshizadeh

Aghaei²,

Bahador³

et al. 2023

Phys. Scr.

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In this research work, “the cavity plasmon multi-mode resonance-based refractive index sensor with ultra-high sensitivity” is presented. The proposed sensor is the metal-insulator-metal nanostructure including the bus waveguide coupled to the hexagonal-ring resonator with rectangular air stubs. The transmittance properties, electric field profile, and magnetic field profile are investigated theoretically and numerically for three types of resonator structures by using the finite-difference time-domain method. Adding the air stubs to the ring resonator structure improves the light-matter interaction and effects of cavity plasmon resonances. The high sensitivity of 1725.5 nm/RIU, 3445 nm/RIU, and 5770 nm/RIU was achieved for mode 1, mode 2, and mode 3 of 6-stub resonator (case 3), respectively. The results show that case 3 enhances the maximum sensitivity by about 8% for none-stub resonator (case 1) and 91% for 2-stub resonator (case 2). The figure of merit is 30.8 RIU-1 in mode 1, 74.9 RIU-1 in mode 2, and 58.6 RIU-1 in mode 3. The presented sensor can be used as a biosensor for glucose detection.

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Section: Simulation and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of cavity plasmon resonance in high-sensitivity MIM nanostructure with rectangular air stubs inside the hexagonal-ring resonator

Keshizadeh

Aghaei²,

Bahador³

et al. 2023

Phys. Scr.

Self Cite

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“…They have obtained a maximum sensitivity of 2963 nm RIU −1 with an FOM of 25.1. Authors of [22] have designed a micro-dimensional refractive index MIM sensor by using a ring-hexagonal resonator and a connected pair of squares-ring resonators with a sensitivity of 2180 nm RIU −1 in the second mode. Authors of [23] have designed a MIM sensor which can act as a biosensor for glucose detection in a design where bus waveguide coupled to the hexagonal-ring resonator with rectangular air stubs.…”

Section: Introductionmentioning

confidence: 99%

Simulation study of a highly sensitive I-shaped Plasmonic nanosensor for sensing of biomolecules

Chauhan,

Sbeah,

Sorathiya

et al. 2024

Phys. Scr.

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This paper presents the design and simulation of an I-shaped metal insulator metal waveguide-based nanosensor for biosensing applications. The device’s sensing property is investigated using the three-dimensional finite element method. In the proposed design a I-shaped cavity is coupled to the main waveguide that serves as a resonator to generate the resonance peaks. The refractive index of the material to be sensed is filled inside the I-shaped cavity. This sensor operates in the near and mid-infrared wavelength ranges. The device can identify a variety of biomolecules, including cancer cells and bacterial samples. The simulation results reveal that device shows different resonance dips for different refractive indexes of cancer cells. The device can obtain sensitivity of 1550 nm/RIU and 1250 nm/RIU among refractive index of normal and cancerous cell for basal and hella cancer cells, respectively. Instead of all these biomolecules, the nanosensor shows different resonance dips in the transmittance spectrum for DNA, RNA, and ribonucleoprotein. Furthermore, the sensor has demonstrated potential applicability as an HB concentration detector and for sensing other blood components. Moreover, we improved the structure characteristics by varying the length and centre area of the cavity, demonstrating that modifying the device parameters can boost sensitivity. After making structural adjustments to the device, the maximum sensitivity of 3000nm/RIU is achieved for some bacterial samples.

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“…In recent decades, graphene plasmonic-based optical tweezers (PT) [12,13] and sensors [14] have been introduced to address mentioned drawbacks and have been utilized in opto uidic systems to sort nanoparticles. For instance, in [12], an active graphene plasmonic tweezers and size/RI based nanoparticle trapping and sorting with radii in the range of 5-50 nm is proposed.…”

Section: Introductionmentioning

confidence: 99%

An Inventive Method for Graphene-Based Optofluidic Tweezer to Actively Detection, Sorting, and Manipulation of Nano-bioparticles below 2.5 nm

Gholizadeh

Jafari

Golmohammadi

2022

Preprint

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This work proposes a novel design composed of graphene nanoribbons-based optofluidic tweezers to manipulate and sort bio-particles with radii below 2.5 nm. The suggested structure has been numerically investigated by the finite difference time domain (FDTD) method employing Maxwell's stress tensor analysis (MST). The finite element method (FEM) has been used to obtain the electrostatic response of the proposed structure. The tweezer main path is a primary channel in the center of the structure, where the microfluidic flow translates the nanoparticle toward this channel. Concerning the microfluid's drag force, the nanoparticles tend to move along the length of the main channel. The graphene nanoribbons are fixed near the main channel at different distances to exert optical forces on the moving nanoparticles in the perpendicular direction. In this regard, sub-channels embedding in the hBN layer on the Si substrate deviate bio-particles from the main path for particular nanoparticle sizes and indices. Intense hotspots with electric field enhancements up to 900 times larger than the incident light are realized inside and around the graphene ribbons. Adjusting the gap distance between graphene nanoribbon and the main channel allows us to separate the individual particle with a specific size from others, thus guiding that in the desired sub-channel. Furthermore, we demonstrated that in a structure with a large gap between channels, particles experience weak field intensity, leading to a low optical force that is insufficient to detect, trap, and manipulate nanoparticles. By varying the chemical potential of graphene associated with the electric field intensity variations in the graphene ribbons, we realized tunability in sorting nanoparticles while structural parameters remained constant. In fact, by adjusting the graphene Fermi level via the applied gate voltage, nanoparticles with any desired radius will be quickly sorted. Moreover, we exhibited that the proposed structure could sort nanoparticles based on their refractive indices. Therefore, the given optofluidic tweezer can detect bio-particles with immense accuracies, such as cancer cells and viruses of tiny size.

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High sensitivity metal-insulator-metal sensor based on ring-hexagonal resonator with a couple of square cavities connected

Cited by 17 publications

References 84 publications

Improvement of cavity plasmon resonance in high-sensitivity MIM nanostructure with rectangular air stubs inside the hexagonal-ring resonator

Improvement of cavity plasmon resonance in high-sensitivity MIM nanostructure with rectangular air stubs inside the hexagonal-ring resonator

Simulation study of a highly sensitive I-shaped Plasmonic nanosensor for sensing of biomolecules

An Inventive Method for Graphene-Based Optofluidic Tweezer to Actively Detection, Sorting, and Manipulation of Nano-bioparticles below 2.5 nm

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