A refractive index sensor based on an analogy T shaped metal–insulator–metal waveguide

Wang, Liu; Zeng, Yaping; Wang, Zhiyong; Xia, Xiongping; Liang, Qiuqun

doi:10.1016/j.ijleo.2018.07.093

Cited by 50 publications

(20 citation statements)

References 35 publications

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“…The SSPs modes found in Figure 2 are strongly dependent on the hybrid plasmonic effects of the gaps, cavity, and metal surfaces in the proposed MIM waveguide system [ 85 , 86 , 87 , 88 , 89 ]. The transmittance spectrum reveals a noticeable filtering feature at the corresponding resonance modes and bandgap regions.…”

Section: Resultsmentioning

confidence: 99%

“…Thanks to the fast progress in nanophotonic, the fabrication of the proposed structure is achievable with current technologies [ 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 , 87 , 88 ], allowing the cost-effective fabrication over a large area. A similar structure of a MIM waveguide with a central-coupled rectangular cavity has previously been fabricated using physical vapor deposition and a focused ion beam for etching the rectangular cavity [ 79 ].…”

Section: Structure Design and Simulation Methodsmentioning

confidence: 99%

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Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

et al. 2020

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A plasmonic metal-insulator-metal waveguide filter consisting of one rectangular cavity and three silver baffles is numerically investigated using the finite element method and theoretically described by the cavity resonance mode theory. The proposed structure shows a simple shape with a small number of structural parameters that can function as a plasmonic sensor with a filter property, high sensitivity and figure of merit, and wide bandgap. Simulation results demonstrate that a cavity with three silver baffles could significantly affect the resonance condition and remarkably enhance the sensor performance compared to its counterpart without baffles. The calculated sensitivity (S) and figure of merit (FOM) in the first mode can reach 3300.00 nm/RIU and 170.00 RIU−1. Besides, S and FOM values can simultaneously get above 2000.00 nm/RIU and 110.00 RIU−1 in the first and second modes by varying a broad range of the structural parameters, which are not attainable in the reported literature. The proposed structure can realize multiple modes operating in a wide wavelength range, which may have potential applications in the on-chip plasmonic sensor, filter, and other optical integrated circuits.

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Section: Resultsmentioning

confidence: 99%

Section: Structure Design and Simulation Methodsmentioning

confidence: 99%

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

et al. 2020

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“…Yan et al [16] presented coupled structure of notched ring cavity and MIM waveguide with stub, whose sensitivity is 1071.4 nm/RIU with an FOM of 14.29. Wang et al [14] designed a nanosensor with sensitivity of 680 nm/RIU and FOM of 8.68, which comprises an analogy T shape cavity and MIM waveguide. Kong et al [32] proposed a temperature sensor consisting of stub coupled with rectangle resonator, which could obtain a sensitivity of 0.36 nm/ • C. In this paper, when the proposed structure serves as a refractive index sensor, its sensitivity can reach 1420 nm/RIU with an FOM of 76.76.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, SPPs have many good properties, such as getting over the classical diffraction of light limit and controlling light within nanoscale [ 3 , 4 , 5 ]. Various optical devices based on SPPs were extensively reported, including filters [ 6 , 7 , 8 , 9 ], optical switching [ 10 , 11 ], splitters [ 12 , 13 ], nanosensors [ 14 , 15 , 16 , 17 , 18 ], and couplers [ 19 ]. Among these, the SPPs-based nanosensor is a significant application, which has advantages of smaller size as well as being easy to integrate into optical circuits and get in touch with sensing mediums.…”

Section: Introductionmentioning

confidence: 99%

A Nanostructure with Defect Based on Fano Resonance for Application on Refractive-Index and Temperature Sensing

Yang

Hua

et al. 2020

Sensors

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Herein, a nanosensor structure is proposed, which comprises metal-insulator-metal (MIM) waveguide with stub and circular ring cavity with a stub (CRCS). The phenomenon of Fano resonance appears in the transmission spectrum, which is formed by interaction between the narrowband mode of CRCS and broadband mode of stub on bus waveguide. The influence of geometric asymmetry on mode splitting of Fano resonance was discussed. The mode splitting of Fano resonance can vastly improve figure of merit (FOM) with a sight decrease of sensitivity. The best performance of the refractive-index nanosensor is attained, which is 1420 nm/RIU with a high FOM of 76.76. Additionally, the application of designed structure on temperature sensing was investigated, which has sensitivity of 0.8 nm/°C. The proposed structure also possesses potential applications on other on-chip nanosensors.

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“…In addition, SPPs can get over the classical diffraction of light limit and control light within nanoscale [3], [4]. Thus, various photonic devices based on SPPs were extensively reported, for instance, filters [5]- [7], optical switching [8], [9], splitters [10], [11], nanosensors [12]- [15], and demultiplexers [16]. Among this, SPPs-based nanosensor is an important application, which has advantages of smaller size as well as being easy to integrate into optical circuits and get in touch with sensing mediums.…”

Section: Introductionmentioning

confidence: 99%

Refractive Index Nanosensor With Simple Structure Based on Fano Resonance

et al. 2020

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Herein, a refractive-index sensor is theoretically proposed, which comprises metal-insulator-metal waveguide and single rectangle cavity without a long side (RCWALS). The propagation characteristics were analyzed by finite element method. Compared with the contrastive structure, the designed single RCWALS structure has better transmission spectra and stronger resonance and supports Fano resonance. The effects of the structural parameters on sensing characteristics were investigated. Mode 1 of single RCWALS structure has better performance parameter, which is the best sensitivity of 1840 nm/RIU with a figure of merit of 51.11. Additionally, three derived structures are presented, which are composed of MIM waveguide and two RCWALS in different positions. They have lower sensitivity but better figure of merit, and provide more detection positions. The designed structures, which are greatly simple, can potentially apply to nanophotonics.

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A refractive index sensor based on an analogy T shaped metal–insulator–metal waveguide

Cited by 50 publications

References 35 publications

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

A Nanostructure with Defect Based on Fano Resonance for Application on Refractive-Index and Temperature Sensing

Refractive Index Nanosensor With Simple Structure Based on Fano Resonance

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