A High Performance Plasmonic Sensor Based on Metal-Insulator-Metal Waveguide Coupled with a Double-Cavity Structure

Luo, Shiming; Li, Bin; Xiong, Dongsheng; Zuo, Duluo; Wang, Xinbing

doi:10.1007/s11468-016-0253-y

Cited by 33 publications

(13 citation statements)

References 35 publications

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“…Compared to its typical structure (case 1), the case 2 structure remarkably enhanced the sensitivity by 157 %. These values are more noticeable than the previous literature (e.g., [70][71][72]) and show multiple modes that can fit the requirement of refractive index sensors in the wavelength of visible and near-infrared. Fig.…”

Section: Resultsmentioning

confidence: 64%

Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Chau

Ming

Chao

et al. 2021

Preprint

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Herein, we design a high sensitivity with a multi-mode plasmonic sensor based on the square ring-shaped resonators containing silver nanorods together with a metal-insulator-metal bus waveguide. The finite element method is used to analyze the transmittance properties and electromagnetic field distributions of the structure in detail. Results show that the coupling effect between the bus waveguide and the side-coupled resonator can enhance by generating gap plasmon resonance among the silver nanorods, increasing the cavity plasmon mode in the resonator. The suggested structure obtained relatively high sensitivity and acceptable figure of merit and quality factor of about 2473 nm/RIU (refractive index unit), 34.18 1/RIU and 56.35, respectively. The achieved plasmonic sensor is ideal for lab-on-chip in gas and biochemical analysis and can significantly enhance the sensitivity by 177% compared to the regular one. The designed structure can apply in nanophotonic devices, and the range of the detected refractive index is suitable for gases and fluids (e.g., gas, isopropanol, optical oil and glucose solution).

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Section: Resultsmentioning

confidence: 64%

Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Chau

Ming

Chao

et al. 2021

Preprint

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“…The FOM of the case with silver nanorods is 29.92/RIU for mode 1, 29.7/RIU for mode 2, 28.8/RIU for mode 3, and 28.0/RIU for mode 4, correspondingly. These values are more extensive than those similar structures reported in the literature (e.g., [ 70 , 71 , 72 ]) and can fit the requirement of refractive index sensing.…”

Section: Resultsmentioning

confidence: 73%

Highly Sensitive and Tunable Plasmonic Sensor Based on a Nanoring Resonator with Silver Nanorods

et al. 2020

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We numerically and theoretically investigate a highly sensitive and tunable plasmonic refractive index sensor that is composed of a metal-insulator-metal waveguide with a side-coupled nanoring, containing silver nanorods using the finite element method. Results reveal that the presence of silver nanorods in the nanoring has a significant impact on sensitivity and tunability performance. It gives a flexible way to tune the system response in the proposed structure. Our designed sensor has a sensitivity of 2080 nm/RIU (RIU is the refractive index unit) along with a figure of merit and a quality factor of 29.92 and 29.67, respectively. The adequate refractive index sensitivity can increase by adding the silver nanorods in a nanoring, which can induce new surface plasmon polaritons (SPPs) modes that cannot be found by a regular nanoring. For a practical application, a valid introduction of silver nanorods in the nanoring can dramatically reduce the dimension of the proposed structure without sacrificing performance.

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“…We start with the simple structure including an input waveguide side-coupled with a single disk resonator (the radius is 241 nm and the gap width between waveguide and disk is 34 nm), or a single ring resonator (the radius is 325 nm and the gap width is 10 nm). The resonance conditions are as follows [15,24]: in insets of Fig. 2(a), m= 3 and 2 for disk modes at 446.3 nm and 586.5 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Hybridization-induced resonances with high-quality factor in a plasmonic chipscale ring-disk nanocavity

Zhang

Yang

Han

et al. 2020

Waves in Random and Complex Media

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Plasmonic resonators have drawn more attention due to the ability to confine light into subwavelength scale. However, they always suffer from a low quality (Q) factor owing to the intrinsic loss of metal. Here, we numerically propose a plasmonic resonator with ultra-high Q factor based on plasmonic metalinsulator-metal (MIM) waveguide structures. The resonator consists of a disk cavity surrounded by a concentric ring cavity, possessing an ultra-small volume. Arising from the plasmon hybridization between plasmon modes in the disk and ring cavity, the induced bonding hybridized modes have ultra-narrow full wave at half maximum (FWHM) as well as ultra-high Q factors. The FWHM can be nearly 1 nm and Q factor can be more than 400. Furthermore, such device can act as a refractive index sensor with ultra-high figure of merit (FOM). This work provides a novel approach to design plasmonic high-Q-factor resonators, and has potential on-chip applications such as filters, sensors and nanolasers.

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A High Performance Plasmonic Sensor Based on Metal-Insulator-Metal Waveguide Coupled with a Double-Cavity Structure

Cited by 33 publications

References 35 publications

Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Significantly Enhanced Coupling Effect and Gap Plasmon Resonance in a MIM-cavity based Sensing Structure

Highly Sensitive and Tunable Plasmonic Sensor Based on a Nanoring Resonator with Silver Nanorods

Hybridization-induced resonances with high-quality factor in a plasmonic chipscale ring-disk nanocavity

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