Guiding properties of asymmetric hybrid plasmonic waveguides on dielectric substrates

Wei, Wei; Zhang, Xia; Huang, Yongqing; Ren, Xiaomin

doi:10.1186/1556-276x-9-13

Cited by 9 publications

(5 citation statements)

References 26 publications

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“…Good fluorescence performance of core-shell CdSe/ZnS QDs was due to the surface passivation by ZnS [ 21 , 22 ]. CdSe solution (3 mL), ODE (1 mL), and OLA (1 mL) were fixed to the three-neck flask.…”

Section: Methodsmentioning

confidence: 99%

A Rapid Detection Method of Brucella with Quantum Dots and Magnetic Beads Conjugated with Different Polyclonal Antibodies

Song

Liu

et al. 2017

Nanoscale Res Lett

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Brucella spp. are facultative intracellular bacteria that cause zoonotic disease of brucellosis worldwide. Traditional methods for detection of Brucella spp. take 48–72 h that does not meet the need of rapid detection. Herein, a new rapid detection method of Brucella was developed based on polyclonal antibody-conjugating quantum dots and antibody-modified magnetic beads. First, polyclonal antibodies IgG and IgY were prepared and then the antibody conjugated with quantum dots (QDs) and immunomagnetic beads (IMB), respectively, which were activated by N-(3-dimethylaminopropyl)-N’-ethylcar-bodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) to form probes. We used the IMB probe to separate the Brucella and labeled by the QD probe, and then detected the fluorescence intensity with a fluorescence spectrometer. The detection method takes 105 min with a limit of detection of 103 CFU/mL and ranges from 10 to 105 CFU/mL (R 2 = 0.9983), and it can be well used in real samples.

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Section: Methodsmentioning

confidence: 99%

A Rapid Detection Method of Brucella with Quantum Dots and Magnetic Beads Conjugated with Different Polyclonal Antibodies

Song

Liu

et al. 2017

Nanoscale Res Lett

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“…SPs are optically induced oscillations of the free electrons at the surface of a metal and can confine and propagate electromagnetic energy far beyond the diffraction limit for electromagnetic waves in dielectric media [1,2]. This could lead to miniaturized photonic components with dimensions scale much smaller than those currently achieved [3,4], such as plasmonic waveguides [5][6][7][8] and plasmonic nanolasers [9,10]. Due to the susceptibility of SPs to surrounding dielectric, SPs and surface plasmon resonance (SPR) exhibit excellent properties for sensing applications [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic circular resonators for refractive index sensors and filters

Wei¹,

Zhang²,

Ren³

2016

Nano Online

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A plasmonic refractive index sensor based on a circular resonator is proposed. With all three dimensions below 1 μm, the sensor has a compact and simple structure granting it ease-of-fabrication and ease-of-use. It is capable of sensing trace amounts of liquid or gas samples. The sensing properties are investigated using finite elements method. The results demonstrate that the plasmonic sensor has a relatively high sensitivity of 1,010 nm/RIU, and the corresponding sensing resolution is 9.9 × 10 −5 RIU. The sensor has a relatively high quality factor of 35, which is beneficial for identifying each transmission spectrum. More importantly, the sensitivity is not sensitive to changes of structure parameters, which means that the sensitivity of the sensor is immune to the fabrication deviation. In addition, with a transmittance of 5% at the resonant wavelength, this plasmonic structure can also be employed as a filter. In addition, by filling material like LiNbO 3 or liquid crystal in the circular resonator, this filter can realize an adjustable wavelength-selective characteristic in a wide band.

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“…Manuscript Among an expanding family of HPWs being investigated during recent years, including conventional configurations that comprise high-index dielectric nanowires placed adjacent to metallic surfaces [1], [2], [4], [23] and silicon-based waveguides composed of truncated metallic strips deposited over silicon-on-insulator (SOI) substrates [9], [24]- [26], a number of modified structures have received particular attention owing to their unique optical properties [5]. By leveraging the hybridization between dielectric and 2-D plasmon modes, such as long-range surface plasmon polaritons in metal stripes [27]- [30] and plasmonic modes in metal wedge [31], [32]/ridge [33]- [39]/slot [40]- [44]/nanowire [45]- [51] waveguides, these modified HPWs hold the promise of enhancing the guiding performance of their traditional hybrid counterparts. However, despite the fact that some of the key modal characteristics of hybrid modes can be improved by utilizing these modified structures, the tradeoff between modal attenuation and field localization still exists in most of the designs.…”

Section: Introductionmentioning

confidence: 99%

Bow-Tie Hybrid Plasmonic Waveguides

Bian

Gong

2014

J. Lightwave Technol.

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We propose a hybrid plasmonic waveguide that incorporates a semiconductor-insulator-metal bow-tie configuration within a low-index gap guarded by semiconductor and metallic nanostructures. Ultratight field confinement (A eff ∼ λ 2 /3100 − λ 2 /120) in conjunction with reasonable propagation distance (L ∼ 56-138 μm) can be achieved simultaneously at a telecommunication wavelength. Compared to a conventional hybrid waveguide, the effective mode area and propagation loss of a typical bow-tie hybrid configuration are reduced by 2-89% and 34-62%, respectively, whereas the figure of merit is enhanced by 53-700%, along with increased power ratio inside the gap region for small gap cases. Studies on fabrication tolerance, waveguide crosstalk, and loss compensation reveal its robust property for practical implementations and remarkable feasibility to realize ultracompact passive and active components. Moreover, we also reveal the broadband feature of the waveguide and show that its concept can be applicable to various other metallic configurations as well, which may open up possibilities for the inventions of numerous high-performance plasmon waveguides and components.

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Guiding properties of asymmetric hybrid plasmonic waveguides on dielectric substrates

Cited by 9 publications

References 26 publications

A Rapid Detection Method of Brucella with Quantum Dots and Magnetic Beads Conjugated with Different Polyclonal Antibodies

A Rapid Detection Method of Brucella with Quantum Dots and Magnetic Beads Conjugated with Different Polyclonal Antibodies

Plasmonic circular resonators for refractive index sensors and filters

Bow-Tie Hybrid Plasmonic Waveguides

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