Investigated the Fano resonance in the nano ring arrangement

Zarrabi, Ferdows B.; Moghadasi, Mohammad Nasser

doi:10.1016/j.ijleo.2017.03.068

Cited by 15 publications

(3 citation statements)

References 34 publications

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“…Fano resonance is achieved through interaction between the hybridized super-radiant di-polar mode and the quadrupolar mode of the ring. Figure of merits up to 72 is reported experimentally on the detection of protein layers [11]. Ferdows B.…”

Section: Introductionmentioning

confidence: 97%

Multiple Plasmonic Fano Resonances Revisited with Modified Transformation-Optics Theory

Jiang

Liang

2023

Chinese J. Elect.

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Plasmonic Fano resonances have recently attracted a great deal of research interest due to their sharp asymmetric profile, high sensitivity to the ambient material and low radiation damping. In this paper, we extend the plasmonic Fano resonances that resulted from the interference between bright and dark modes in a coreshell nanoparticle system for novel biosensing, optical switching applications, by using the theory of transformation optics. To this end, we consider the optical properties of dielectric-core-metallic-shell dimer and derive full analytical formulae for different geometric configurations. Our results demonstrated that breaking the geometrical symmetry of the structure, multiple Fano resonances arise owing to the near-field coupling of the bright and dark resonant modes. Electromagnetic induced transparency (EIT)-like effects are observed when the resonance frequencies of the bright and dark modes overlap. Strong dependence of the localized surface plasmon (LSP) on the geometry renders the multiple Fano resonances highly tunable in the proposed structure through independently altering the spectral profile of each nanoparticle, which provides much feasibility since most multiple Fano resonances reported in literature are results of collective plasmonic behavior and cannot be tuned independently. Furthermore, the figure of merit for refractive index sensing of the higher-order dark modes are predicted to be up to 36% greater than that of a single nanowire. These results make the proposed nanostructure attractive for many potential applications such as multiwavelength biosensing, switching and modulation.

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Section: Introductionmentioning

confidence: 97%

Multiple Plasmonic Fano Resonances Revisited with Modified Transformation-Optics Theory

Jiang

Liang

2023

Chinese J. Elect.

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“…The observation implies that the hybrid metal-dielectric composite nanostructure is a promising option for combining the field enhancement effect of the metal and accomplish low loss of the dielectric materials. Zuev et al used a femtosecond laser to remodel gold nanoparticles in Au/Si to change the optical properties [17] and Zarrabi et al found that the plasmonic nanoring with Fano response exhibits an enhanced near-field electric field [18]. Dutta et al experimentally demonstrated that two disk-shape gold oligomers can provide Fano resonance in the scattering response [19] and Torres et al found that the radiated field can have a complex distribution determined by the internal geometry of the nanowire [20].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

Wang

Liu

et al. 2022

Coatings

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A nanoantenna with Fano response is designed with plasmonic oligomers as a refractive index sensor to enhance surface-enhanced Raman scattering (SERS) in the visible light spectrum. The scattered radiation and field-enhanced interactions of the outer gallium phosphide (GaP) nanoring assembled with an inner heptamer of silver with Fano response are investigated systematically using the finite element method. The characteristics of Fano resonance are found to depend on the size, shape and nature of the materials in the hybrid nanoantenna. The confined electromagnetic field produces a single-point electromagnetic hotspot with up to 159.59 V/m. The sensitivity obtained from the wavelength shift and variation in the scattering cross-section (SCS) shows a maximum value of 550 nm/RIU. The results validate the design concept and demonstrate near-field enhancement, enabling the design of high-performance nanoantennas with enhanced optical sensing and SERS properties.

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“…Due to the advances achieved in the investigations of electromagnetic properties of nanostructure materials, the interest in the field of nanoplasmonics is rapidly increasing [1][2][3], which has opened up many opportunities toward practical applications. The extreme confinement and enhancement of light at the nanoscale are very interesting features of metallic nanostructures [4][5][6][7]. The understanding of this confinement has led to the development of a wide range of interesting materials for various fields.…”

Section: Introductionmentioning

confidence: 99%

Refractive Index Sensor Mim Based Waveguide Coupled With a Slotted Side Resonator

Achi¹,

Hocini²,

Salah³

et al. 2020

PIER M

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In this paper, a plasmonic sensor based on a metal-insulator-metal (MIM) waveguide with a slotted side-coupled racetrack cavity is proposed. The transmission characteristics of the cavity are analyzed theoretically, and the improvements of performance for the racetrack cavity structure compared to a single disk cavity are studied. The influence of structural parameters on the transmission spectra and sensing performances is investigated thoroughly. The achieved sensitivity for the first mode was S = 959 nm/RIU and S = 2380 nm/RIU for the second one. Its corresponding sensing resolution is 1.04 × 10 −5 RIU for mode 1 and 4.20 × 10 −6 RIU for mode 2, respectively, and high transmissions are achieved at the two resonant wavelengths of 898.8 nm and 1857.1 nm. The proposed plasmonic sensor is a good candidate for designing novel devices and applications, in the field of chemical and biological sensing, and also in the field of plasmonic filters, switches, etc.

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Investigated the Fano resonance in the nano ring arrangement

Cited by 15 publications

References 34 publications

Multiple Plasmonic Fano Resonances Revisited with Modified Transformation-Optics Theory

Multiple Plasmonic Fano Resonances Revisited with Modified Transformation-Optics Theory

Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

Refractive Index Sensor Mim Based Waveguide Coupled With a Slotted Side Resonator

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