A Nanoscale Refractive Index Sensor Based on Asymmetric Plasmonic Waveguide With a Ring Resonator: A Review

Zou, Shi-Wei; Wang, Faqiang; Liang, Renrong; Xiao, Liping; Miao, Houxun

doi:10.1109/jsen.2014.2364251

Cited by 85 publications

(30 citation statements)

References 25 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%

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%

Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Shamy

Khalil

Swillam

2020

Sci Rep

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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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“…[5][6][7][8][9] These sensors are 1D or 2D gratings 5,10-14 apart from gold colloids/its variations, 6,15 ring resonators, 8,16 evanescent field optical waveguides, 17 etc. These applications are dependent on the sensitivity of surface plasmon polaritons (SPPs) to the refractive index (RI) of the medium adjacent to the metal surface.…”

Section: Introductionmentioning

confidence: 99%

Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

Vempati

Iqbal

Afsheen

2015

Journal of Applied Physics

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We report on a non-universal behavior of leaky surface plasmon waves on asymmetric (Si/Au/ analyte of different height) 1D grating through numerical modelling. The occurrence of the leaky surface wave was maximized (suppressing the Fabry-Perot cavity mode), which can be identified in a reflection spectrum through characteristic minimum. Beyond a specific analyte height (h), new sets of surface waves emerge, each bearing a unique reflection minimum. Furthermore, all of these minima depicted a red-shift before saturating at higher h values. This saturation is found to be non-universal despite the close association with their origin (being leaky surface waves). This behavior is attributed to the fundamental nature and the origin of the each set. Additionally, all of the surface wave modes co-exit at relatively higher h values. V C 2015 AIP Publishing LLC.

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A Nanoscale Refractive Index Sensor Based on Asymmetric Plasmonic Waveguide With a Ring Resonator: A Review

Cited by 85 publications

References 25 publications

Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

Mid Infrared Optical Gas Sensor Using Plasmonic Mach-Zehnder Interferometer

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

Non-universal behavior of leaky surface waves in a one dimensional asymmetric plasmonic grating

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