A Novel Plasmonic Sensor Based on Metal–Insulator–Metal Waveguide With Side-Coupled Hexagonal Cavity

Xie, Yiyuan; Huang, Yexiong; Zhao, Wenrui; Xu, Weihua; He, Chao

doi:10.1109/jphot.2015.2419635

Cited by 93 publications

(41 citation statements)

References 32 publications

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“…Many refractive index gas sensors -refractometers -were proposed recently [5][6][7][8] , where the real part (n) of the refractive index is detected. Refractive index sensors have the advantage of ultra-small sample volume as its sensitivity does not depend on the sample volume, and hence are promising for integrated on chip sensors 9 .…”

mentioning

confidence: 99%

“…Detecting the real part of the refractive index using wavelength interrogation requires either a spectrometer or a tunable laser, which will add to the size and cost of the sensor. However, many of the previously proposed refractive index gas sensors utilized wavelength interrogation [5][6][7][8] .…”

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confidence: 99%

“…The sensor analysis and design are done using finite difference time domain (FDTD) solver 30 . Two sensor designs are proposed; the first design is optimized for wavelength interrogation like many of the previously published refractive index sensors [5][6][7][8][27][28][29] , while the second design is optimized for intensity interrogation scheme, which possesses the advantages of high compactness and low cost. These designs have all the advantages of the previously proposed liquid MZI sensor 29 , in addition to, its high sensitivity to gaseous medium and operation in the mid infrared, around the characteristic absorption of gases.…”

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confidence: 99%

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Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Shamy

Khalil

Swillam

2020

Sci Rep

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In this work, we propose an optimized design for on-chip gas sensor using metal-insulator (MI) plasmonic waveguide in the mid infrared range and utilizing a Mach-Zehnder Inetrferometer (MZI). The MI waveguide utilizes a high index dielectric layer on top of the metal to enhance the sensitivity of the sensor. The thickness and the refractive index of this layer are optimized to achieve high sensitivity. Using this layer, a design that exhibits high performance for both wavelength and intensity interrogation schemes is achieved. In addition, another one that furtherly enhances the sensor performance for intensity interrogation is also proposed. This design also minimizes the sensor sensitivity to wavelength variations. intensity interrogation scheme has the advantage of eliminating the size and cost needed by wide wavelength band measurements including either spectrometer or tunable laser in wavelength interrogation. The first design sensitivity has reached 10000 nm/RIU with wavelength interrogation figure of merit (FOM λ ) of 133RIU −1 and intensity interrogation foM i of 239RIU −1 . While the second one exhibit FOM i of 363RIU −1 , both with length of 250 µm around 4.6 µm wavelength. Finally, these structures are cheap, compact, and easy to fabricate.

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confidence: 99%

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confidence: 99%

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confidence: 99%

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Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Shamy

Khalil

Swillam

2020

Sci Rep

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“…Metal-insulator-metal (MIM) configuration which has been utilized former in many structures such as waveguides, filters, switches and interferometers can enhance the sensing performance of plasmonic sensors 17 . For example, Xie et al have suggested a plasmonic sensor based on MIM waveguide with side-coupled hexagonal cavity 36 . They have achieved the high sensitivity of 1562.5 nm/RIU and good FOM of 38.6 RIU −1 at λ = 1550 nm.…”

Section: Multi-band Mim Refractive Index Biosensor Based On Ag-air Grmentioning

confidence: 99%

Multi-band MIM refractive index biosensor based on Ag-air grating with equivalent circuit and T-matrix methods in near-infrared region

Nejat

Nozhat

2020

Sci Rep

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In this paper, a multi-band metal-insulator-metal (MIM) perfect absorber with refractive index sensing capability has been investigated in near-infrared region. The proposed structure has been studied for biomedical applications such as detection of solution of glucose in water, diagnosis of different stages of malaria infection, bacillus bacteria and cancer cells. The MIM configuration improves the sensing parameters of the biosensor due to the good interaction with the analyte. The high sensitivity and figure of merit of 2000 nm/RIU and 100 RIU−1 have been achieved, respectively. Also, the Ag-air grating in the suggested plasmonic sensor helps the localized surface plasmons excitation and makes the structure sensitive to the incident lightwave polarization. Therefore, the presented biosensor behaves like a polarization switch with the high extinction ratio and fast response time of 25.15 dB and 100 fs, respectively. The methods of equivalent circuit model and transmission matrix have been utilized to verify the simulation results, as a new challenge in near-infrared region. The new idea of multi-application plasmonic devices, the feasibility of fabrication for the presented structure and utilizing mentioned analytical methods in near-infrared region could pave the way for the future of plasmonic structures.

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“…Due to not only supporting modes with deep sub-wavelength scales and high group velocity over a very wide range of frequencies but also offering very high optical confinement and acceptable propagation length [5], metal-insulator-metal (MIM) structures, such as optical filters [6,7,8,9], optical switches [10], demultiplexers [11,12], and sensors [13,14,15,16], are widely used. Plasmonic filters based on MIM waveguide structures, such as asymmetric nanodisk filter and sensor [17,18,19], side-coupled cavity sensor [20], notch resonator filter and sensor [21], and circular ring filter and sensor [22,23], are one of the most important optical devices, have attracted tremendous attention, and have been investigated widely in recent years. All of the above-mentioned devices are promising candidates for highly integrated optical circuits.…”

Section: Introductionmentioning

confidence: 99%

Tunable Plasmonic Band-Pass Filter with Dual Side-Coupled Circular Ring Resonators

Liu

Wang

Feng

et al. 2017

Sensors

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A wavelength band-pass filter with asymmetric dual circular ring resonators in a metal-insulator-metal (MIM) structure is proposed and numerically simulated. For the interaction of the local discrete state and the continuous spectrum caused by the side-coupled resonators and the baffle, respectively, the transmission spectrum exhibits a sharp and asymmetric profile. By adjusting the radius and material imbedded in one ring cavity, the off-to-on plasmon-induced absorption (PIA) optical response can be tunable achieved. In addition, the structure can be easily extended to other similar compact structures to realize the filtering task. Our structures have important potential applications for filters and sensors at visible and near-infrared regions.

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A Novel Plasmonic Sensor Based on Metal–Insulator–Metal Waveguide With Side-Coupled Hexagonal Cavity

Cited by 93 publications

References 32 publications

Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Multi-band MIM refractive index biosensor based on Ag-air grating with equivalent circuit and T-matrix methods in near-infrared region

Tunable Plasmonic Band-Pass Filter with Dual Side-Coupled Circular Ring Resonators

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