Sensitivity Enhancement of Two-Dimensional Materials Based on Genetic Optimization in Surface Plasmon Resonance

Sensitivity is an important performance index for evaluating surface plasmon resonance (SPR) biosensors. Sensitivity enhancement has always been a hot topic. It is found that the different refractive indices of samples require different combinations of prism and metal film for better sensitivity. Furthermore, the sensitivity can be enhanced by coating two-dimensional (2D) materials with appropriate layers on the metal film. At this time, it is necessary to choose the best film configuration to enhance sensitivity. With the emergence of more and more 2D materials, selecting the best configuration manually is becoming more complicated. Compared with the traditional manual method of selecting materials and layers, this paper proposes an optimization method based on a genetic algorithm to quickly and effectively find the optimal film configuration that enhances sensitivity. By using this method, not only can the optimal number of layers of 2D materials be determined quickly, but also the optimal configuration can be conveniently found when many materials are available. The maximum sensitivity can reach 400°/RIU after optimization. The method provided application value for the relevant researchers seeking to enhance sensitivity.

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Monitoring Biomaterials with Light: Review of Surface Plasmon Resonance Biosensing Using two Dimensional Materials

10.20944/preprints202101.0483.v1 ◽

2021 ◽

Author(s):

Parsa Yari ◽

Homa Farmani ◽

Ali Farmani ◽

Amir Mosavi

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

High Sensitivity ◽

Optical Biosensors ◽

Two Dimensional ◽

Plasmonic Sensors ◽

Analysis Instrument ◽

Two Dimensional Materials ◽

Fiber Optical

The purpose of this paper is to present advanced techniques in optical biodevices. Moreover different configurations involving the generation of fiber optical biosensors are described. To overcome some limitations of fiber optical biosensors, plasmonic phenomena proposed. In addition novel plasmonic phenomena have broaden researcher’s horizons in new discovering in terms of technology and application. As regards there are many challenges to detect ultra-low concentration samples with high sensitivity in real time. Researchers have always made great efforts to discover more effective methods. Throughout the paper SPR and LSPR as a powerful analysis instrument are introduced. Finally surveys the current practical performances of plasmonic sensors in detection of bio target are provided. As a result these devices demonstrate great potential in identifying target analytic due to their unique optical biosensors.

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Sensitivity enhancement of surface plasmon resonance sensor using hybrid configuration of 2D materials over bimetallic layer of Cu–Ni

Optics Communications ◽

10.1016/j.optcom.2020.125337 ◽

2020 ◽

Vol 463 ◽

pp. 125337

Author(s):

G. AlaguVibisha ◽

Jeeban Kumar Nayak ◽

P. Maheswari ◽

N. Priyadharsini ◽

A. Nisha ◽

...

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

2D Materials ◽

Sensitivity Enhancement ◽

Surface Plasmon Resonance Sensor ◽

Resonance Sensor ◽

Bimetallic Layer ◽

Hybrid Configuration

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Sensitivity Improvement of a Surface Plasmon Resonance Sensor Based on Two-Dimensional Materials Hybrid Structure in Visible Region: A Theoretical Study

Sensors ◽

10.3390/s20092445 ◽

2020 ◽

Vol 20 (9) ◽

pp. 2445 ◽

Cited By ~ 2

Author(s):

Zhining Lin ◽

Shujing Chen ◽

Chengyou Lin

Keyword(s):

Surface Plasmon Resonance ◽

Surface Plasmon ◽

Plasmon Resonance ◽

2D Materials ◽

Incident Light ◽

Visible Region ◽

Hybrid Structure ◽

Two Dimensional ◽

Spr Sensor ◽

Sensitivity Improvement

In this paper, we propose a surface plasmon resonance (SPR) sensor based on two-dimensional (2D) materials (graphene, MoS2, WS2 and WSe2) hybrid structure, and theoretically investigate its sensitivity improvement in the visible region. The thickness of metal (Au, Ag or Cu) and the layer number of each 2D material are optimized using genetic algorithms to obtain the highest sensitivity for a specific wavelength of incident light. Then, the sensitivities of proposed SPR sensors with different metal films at various wavelengths are compared. An Ag-based SPR sensor exhibits a higher sensitivity than an Au- or Cu-based one at most wavelengths in the visible region. In addition, the sensitivity of the proposed SPR sensor varies obviously with the wavelength of incident light, and shows a maximum value of 159, 194 or 155°/RIU for Au, Ag or Cu, respectively. It is demonstrated that the sensitivity of the SPR sensor based on 2D materials’ hybrid structure can be further improved by optimizing the wavelength of incident light.

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Surface Plasmonic Sensors: Sensing Mechanism and Recent Applications

Sensors ◽

10.3390/s21165262 ◽

2021 ◽

Vol 21 (16) ◽

pp. 5262

Author(s):

Qilin Duan ◽

Yineng Liu ◽

Shanshan Chang ◽

Huanyang Chen ◽

Jin-hui Chen

Keyword(s):

Surface Plasmon Resonance ◽

Optical Fiber ◽

Surface Plasmon ◽

Optical Sensors ◽

Plasmon Resonance ◽

2D Materials ◽

Localized Surface Plasmon ◽

Plasmonic Sensors ◽

Hyperbolic Dispersion ◽

Challenges And Opportunities

Surface plasmonic sensors have been widely used in biology, chemistry, and environment monitoring. These sensors exhibit extraordinary sensitivity based on surface plasmon resonance (SPR) or localized surface plasmon resonance (LSPR) effects, and they have found commercial applications. In this review, we present recent progress in the field of surface plasmonic sensors, mainly in the configurations of planar metastructures and optical-fiber waveguides. In the metastructure platform, the optical sensors based on LSPR, hyperbolic dispersion, Fano resonance, and two-dimensional (2D) materials integration are introduced. The optical-fiber sensors integrated with LSPR/SPR structures and 2D materials are summarized. We also introduce the recent advances in quantum plasmonic sensing beyond the classical shot noise limit. The challenges and opportunities in this field are discussed.

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