Numerical study on refractive index sensor based on hybrid-plasmonic mode

Yun, Jeong-Geun; Kim, Joonsoo; Lee, Kyookeun; Lee, Yohan; Lee, Byoungho

doi:10.1117/12.2264068

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…COMSOL Multiphysics software based on the finite element method can be applied to solve the partial differential equation, and the transmission spectra of the coupling structure under different incident light frequencies can be obtained. The transmittance is defined as T = ( S 21 ) 2 , where S 21 is the transmission coefficient from input to output ( P 1 to P 2 ) [ 28 ].…”

Section: Model and Analytical Methodsmentioning

confidence: 99%

“…In recent years, optical phenomena such as Fano resonance [ 21 , 22 , 23 ] and plasmon-induced transparency [ 24 , 25 ] caused by metal–insulator–metal (MIM) waveguide coupling cavities, which are sensitive to the surrounding environment, have attracted the interest of domestic and foreign researchers to study SPP sensors [ 26 , 27 , 28 ]. Thus, many sensors based on the MIM waveguide have been investigated and reported.…”

Section: Introductionmentioning

confidence: 99%

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Refractive Index Sensor Based on a Metal–Insulator–Metal Waveguide Coupled with a Symmetric Structure

Yan

Zhang

Zhao

et al. 2017

Sensors

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In this study, a new refractive index sensor based on a metal–insulator–metal waveguide coupled with a notched ring resonator and stub is designed. The finite element method is used to study the propagation characteristics of the sensor. According to the calculation results, the transmission spectrum exhibits a typical Fano resonance shape. The phenomenon of Fano resonance is caused by the coupling between the broadband spectrum and narrowband spectrum. In the design, the broadband spectrum signal is generated by the stub, while the narrowband spectrum signal is generated by the notched ring resonator. In addition, the structural parameters of the resonators and the structure filled with media of different refractive indices are varied to study the sensing properties. The maximum achieved sensitivity of the sensor reached 1071.4 nm/RIU. The results reveal potential applications of the coupled system in the field of sensors.

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Section: Model and Analytical Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Refractive Index Sensor Based on a Metal–Insulator–Metal Waveguide Coupled with a Symmetric Structure

Yan

Zhang

Zhao

et al. 2017

Sensors

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“…In recent years, the various plasmonic nanostructures have drawn great attention in applications such as thermal emitters [ 1 ], color filters [ 2 , 3 , 4 ], solar cells [ 5 , 6 ], chemical and biological sensors [ 7 , 8 , 9 ], imaging devices [ 10 , 11 , 12 ], etc. Among these nanostructures, periodic nanogratings are playing a crucial role in this rapidly growing plasmonics research field [ 13 , 14 , 15 ]. A series of nanogratings with different structural configurations have been designed and discussed.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Angle-Tolerant Polarization-Tuned Filtering and Wide-Range Refractive Index Sensing Based on Metal Film Coated Nanograting

Cui

Chen

et al. 2020

Nanomaterials

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The miniaturization and integration of photonic devices are new requirements in the fast-growing optics field. In this paper, we focus on a feature-rich sub-wavelength nanograting-coated single-layer metal film. The numerical results show that the reflection behaviors of this proposed structure can realize bidirectional dual-channel ultra-narrowband polarized filtering and bidirectional wavelength-modulated sensing in a wide refractive index (RI) range from 1.0 to 1.4 for incident angle of 10° with transverse-magnetic (TM) polarized illumination at wavelengths between 550 nm to 1500 nm. Moreover, the bidirectional properties of filtering and sensing are not obviously decreased when increasing incident angle from 10° to 30°, and decreasing incident angle from 10° to 0°. The calculated RI sensitivity can be up to 592 nm/RIU with a high figure of merit (FOM) of 179.4 RIU−1. More to the point, this nanograting has a simple structure and is less sensitive to the height and shape of grating ridge, which provides great convenience for the fabrication of devices. The other thing that is going on is that this structure can also realize synchronously tunable color filtering, including green to red, with high color purity in the visible band by choosing the period. The underlying physical mechanism is analyzed in detail, and is primarily attributed to surface plasmon polariton (SPP) resonance and dipole resonance at double plasmon resonance wavelengths. This work has tremendous potential in developing multipurpose and high-performance integrated optical devices such as spectral filters, colored displays and plasmon biomedical sensors.

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