Detuned Plasmonic Bragg Grating Sensor Based on a Defect Metal-Insulator-Metal Waveguide

Qu, Shinian; Song, Ci; Xia, Xiushan; Liang, Xiuye; Tang, Baojie; Hu, Zheng-Da; Wang, Jicheng

doi:10.3390/s16060784

Cited by 28 publications

(25 citation statements)

References 27 publications

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“…The insulators in the cavities and waveguide are chosen to be air ( n = 1.0). The metal is silver, whose frequency-dependent complex relative permittivity is characterized by the Drude model [30,31]:

ε_{m} (ω) = ε_{\infty} - \frac{ω_{p}^{2}}{ω (ω + i γ)}

where ε ∞ is the dielectric constant at the infinite frequency, γ is the electron collision frequency, ω is the frequency of the incident light and ω p is the bulk plasma frequency. The parameters are ε ∞ = 3.7, ω p = 1.38 × 10 16 Hz and γ = 2.73 × 10 13 Hz.…”

Section: Structure Descriptions and Theory Analysismentioning

confidence: 99%

High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities

Zhang

Shao

Zeng

2016

Sensors

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In this paper, a type of compact nanosensor based on a metal-insulator-metal structure is proposed and investigated through cascading double asymmetric cavities, in which their metal cores shift along different axis directions. The cascaded asymmetric structure exhibits high transmission and sharp Fano resonance peaks via strengthening the mutual coupling of the cavities. The research results show that with the increase of the symmetry breaking in the structure, the number of Fano resonances increase accordingly. Furthermore, by modulating the geometrical parameters appropriately, Fano resonances with high sensitivities to the changes in refractive index can be realized. A maximum figure of merit (FoM) value of 74.3 is obtained. Considerable applications for this work can be found in bio/chemical sensors with excellent performance and other nanophotonic integrated circuit devices such as optical filters, switches and modulators.

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ε_{m} (ω) = ε_{\infty} - \frac{ω_{p}^{2}}{ω (ω + i γ)}

Section: Structure Descriptions and Theory Analysismentioning

confidence: 99%

High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities

Zhang

Shao

Zeng

2016

Sensors

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“…Furthermore, we design the PBR units into the multi-step pattern to deal with the high insertion loss and severe rippling in the transmission spectra resulting from the abrupt change of N eff in the groove depth [24,25]. The 2D schematic of the three-step, five-step, and seven-step versions of the PBR units are illustrated in Figure 4a.…”

Section: Simulations and Resultsmentioning

confidence: 99%

Tunable Multiple-Step Plasmonic Bragg Reflectors with Graphene-Based Modulated Grating

Qian

Liang

et al. 2016

Sensors

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We propose a novel plasmonic Bragg reflector (PBR) based on graphene with multiple-step silicon structure. The monolayer graphene bears locally variable optical properties by modulation of electric fields, and the periodical change of effective refractive index on graphene can be obtained by external bias voltage in the mid-infrared region. Through patterning the PBR units into multiple-step structures, we can decrease the insertion loss and suppress the rippling in transmission spectra. By introducing the defect into the multiple-step PBRs, the multiple resonance modes are formed inside the stopband by increasing the step number. This work may pave the ways for the further development of ultra-compact low-cost hyperspectral sensors in the mid-infrared region.

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“…SPP waveguides can have either an insulator‐metal‐insulator (IMI) or a metal‐insulator‐metal (MIM) configuration . The latter structure is the most suitable for the manufacturing of the resonant structures …”

Section: Integrated Photonic Solutions For Biosensingmentioning

confidence: 99%

Integrated Photonic and Plasmonic Resonant Devices for Label‐Free Biosensing and Trapping at the Nanoscale

Ciminelli

Dell’Olio

Conteduca

et al. 2018

Physica Status Solidi (a)

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In the last few years, integrated photonic and plasmonic devices based on resonant cavities have become key building blocks in new microsystems, instruments, and diagnostic tools for a wide range of biomedical applications including point‐of‐care (POC) diagnostics, new drug development, and proteomics. Several resonant label‐free photonic and plasmonic biosensors for early diagnosis and monitoring of a wide range of pathologies have attracted a remarkable research interest due to their characteristic features such as high resolution, small size, immunity to electromagnetic interferences, compatibility with the CMOS technology, and strong light–matter interaction. Moreover, recently, photonic, plasmonic, and hybrid photonic/plasmonic micro and nano‐cavities have experimentally demonstrated a great potential also for trapping at the nanoscale and the interest toward these devices in the field of healthcare is quickly rising. Here, the recent advances in the field of integrated photonic and plasmonic devices based on resonant cavities for label‐free biosensing and trapping at the nanoscale are critically reviewed, with a special emphasis on the specific applications of these devices such as diseases diagnostics and new drugs development.

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Detuned Plasmonic Bragg Grating Sensor Based on a Defect Metal-Insulator-Metal Waveguide

Cited by 28 publications

References 27 publications

High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities

High Quality Plasmonic Sensors Based on Fano Resonances Created through Cascading Double Asymmetric Cavities

Tunable Multiple-Step Plasmonic Bragg Reflectors with Graphene-Based Modulated Grating

Integrated Photonic and Plasmonic Resonant Devices for Label‐Free Biosensing and Trapping at the Nanoscale

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