Subwavelength plasmonic liquid sensor using Fano resonance in a ring resonator structure

Chauhan, Diksha; Adhikari, Rammani; Saini, Raj Kumar; Chang, Shih-Yu; Dwivedi, Ram Prakash

doi:10.1016/j.ijleo.2020.165545

Cited by 20 publications

(10 citation statements)

References 54 publications

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“…2 at the 1.538 to 1.540 µm double peak [28]. Special features of Fano resonance is the sharp dip [34] with local maximum and minimum as shown in Fig. 2.…”

Section: Vernier and Fano Resonance Spectrummentioning

confidence: 83%

Integrating Vernier spectrum with Fano resonance for high sensitivity of an all-optical sensor

Aman

Noorden²,

Fajri³

et al. 2022

J Comput Electron

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Vernier and Fano resonances are promising approaches for enhancing the sensitivity of an alloptical sensor. A theoretical analysis was performed to integrate a Fano-like resonance shape with a Vernier resonance by considering the presence of partial reflective end facets at a double microring resonator waveguide. The system was developed based on scattering matrix and optical transfer function. The double and all-pass racetrack microring configurations were compared with and without the end facet at the waveguide to analyze the dynamic change of the output resonance spectrum. The spectrum were analyzed based on the free spectral range and resonance pattern. The resonator systems were applied to refractive index-based sensing protocol, which was operated by a shift of resonance wavelength with a change of refractive index. The sensitivity was optimized by varying the configuration parameters such as the radius of the ring, the distance between end facet, and the coupling coefficients. Integrating Vernier spectrum with Fano resonance improved the sensitivity for all-pass racetrack configuration by 5.16 % and the sensitivity for double racetrack configuration by 6.31 %. The recorded limit of detection (LOD) of double racetrack was 3.30 × 10 -5 .

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“…2 at the 1.538 to 1.540 µm double peak [28]. Special features of Fano resonance is the sharp dip [34] with local maximum and minimum as shown in Fig. 2.…”

Section: Vernier and Fano Resonance Spectrummentioning

confidence: 83%

Integrating Vernier spectrum with Fano resonance for high sensitivity of an all-optical sensor

Aman

Noorden²,

Fajri³

et al. 2022

J Comput Electron

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“…In this section, the focus will be on the creation of FR(s) by resonators with different geometrical shapes and with different structural parameters. From the literature, it can be stated that the resonators providing a continuum mode mainly include stub(s) [64], cavity [50], ring [65,66], rectangle [67,68], disk [69], circular ring [70], square [71], various resonators with defects [60,72], and their composite [73,74]. The resonators providing the localized mode mainly include the stub MIM WG [75], single baffle MIM WG, and double baffle MIM WG [76].…”

Section: The Geometry Of the Fano Resonatorsmentioning

confidence: 99%

“…Since the gap creates a discontinuity in the WG, it helps generate the resonances, which, in turn, cause multiple reflections between air and metal surfaces, and functions similar to the FP interferometer. Energy of the excited waves is stored by the gap because it acts as an energy storage unit and produces many barrier bands resulting in resonances at different wavelengths [66]. Multiple peaks are produced in transmission scattering under the resonance conditions governed by the following relationship:…”

Section: Theory Of Resonance Due To a Discontinuity/breakmentioning

confidence: 99%

See 1 more Smart Citation

Opto-Electronics Review

Adhikari,

Chauhan,

Mola

et al. 2021

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Fano resonance is an optical effect that emerges from the coherent coupling and interference (constructive and destructive) between the continuous state (background process) and the Lorentzian state (resonant process) in the plasmonic waveguide-resonator system. This effect has been used in the applications like optical sensors. These sensors are extensively used in sensing biochemicals and gases by the measurement of refractive index changes as they offer high sensitivity and ultra-high figure of merit. Herein, we surveyed several plasmonic Fano sensors with different geometries composed of metal-insulatormetal waveguide(s). First, the resonators are categorized based on different architectures. The materials and methods adopted for these designs are precisely surveyed and presented. The performances are compared depending upon the characterization parameters like sensitivity and figure of merit. Finally, based on the survey of very recent models, the advances and challenges of refractive index sensing deployed on Fano resonances are discussed.

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“…The ideal BIC is perturbed and switched into a quasi-BIC mode through the destruction of the symmetry that allows transmission into the external continuum, which leads to limitations on the linewidth and Q-factor of resonance. The research related to optical Fano resonance has expanded from mono-Fano resonance to multi-Fano resonances with the advancement of sensing technology [ [18] , [19] , [20] ].…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano resonances on the metastructure of all-dielectric nanopore arrays excited by breaking two-different-dimensional symmetries

Fan

et al. 2023

Heliyon

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Subwavelength plasmonic liquid sensor using Fano resonance in a ring resonator structure

Cited by 20 publications

References 54 publications

Integrating Vernier spectrum with Fano resonance for high sensitivity of an all-optical sensor

Integrating Vernier spectrum with Fano resonance for high sensitivity of an all-optical sensor

Opto-Electronics Review

Multiple Fano resonances on the metastructure of all-dielectric nanopore arrays excited by breaking two-different-dimensional symmetries

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