scholarly journals On the performance of a tunable grating-based high sensitivity unidirectional plasmonic sensor

2021 ◽  
Author(s):  
Javier González-Colsa ◽  
Guillermo Serrera ◽  
Jose Saiz ◽  
Francisco Gonzalez ◽  
Fernando Moreno ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Plasmonic Sensor

scholarly journals High Sensitivity Plasmonic Sensor Based on Fano Resonance with Inverted U-Shaped Resonator

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1164
Author(s):  
Gongli Xiao ◽  
Yanping Xu ◽  
Hongyan Yang ◽  
Zetao Ou ◽  
Jianyun Chen ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Figure Of Merit ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Multimode Interference ◽  
Geometrical Parameters ◽  
The Finite Element Method ◽  
Plasmonic Sensor ◽  
Coupled Mode ◽  
Plasmonic Nanosensor

Herein, we propose a tunable plasmonic sensor with Fano resonators in an inverted U-shaped resonator. By manipulating the sharp asymmetric Fano resonance peaks, a high-sensitivity refractive index sensor can be realized. Using the multimode interference coupled-mode theory and the finite element method, we numerically simulate the influences of geometrical parameters on the plasmonic sensor. Optimizing the structure parameters, we can achieve a high plasmonic sensor with the maximum sensitivity for 840 nm/RIUand figure of merit for 3.9 × 105. The research results provide a reliable theoretical basis for designing high sensitivity to the next generation plasmonic nanosensor.

scholarly journals Perfect Dual-Band Absorber Based on Plasmonic Effect with the Cross-Hair/Nanorod Combination

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 493 ◽  
Author(s):  
Yuan-Fong Chou Chau ◽  
Chung-Ting Chou Chao ◽  
Hung Ji Huang ◽  
Muhammad Raziq Rahimi Kooh ◽  
N. T. R. N. Kumara ◽  
...  
Keyword(s):  
Figure Of Merit ◽  
Near Infrared ◽  
High Sensitivity ◽  
Dual Band ◽  
Localized Surface Plasmon ◽  
Perfect Absorber ◽  
Plasmonic Effect ◽  
Plasmonic Sensor ◽  
Nanophotonic Devices ◽  
The Cross

Plasmonic effect using a cross-hair can convey strongly localized surface plasmon modes among the separated composite nanostructures. Compared to its counterpart without the cross-hair, this characteristic has the remarkable merit of enhancing absorptance at resonance and can make the structure carry out a dual-band plasmonic perfect absorber (PPA). In this paper, we propose and design a novel dual-band PPA with a gathering of four metal-shell nanorods using a cross-hair operating at visible and near-infrared regions. Two absorptance peaks at 1050 nm and 750 nm with maximal absorptance of 99.59% and 99.89% for modes 1 and 2, respectively, are detected. High sensitivity of 1200 nm refractive unit (1/RIU), figure of merit of 26.67 and Q factor of 23.33 are acquired, which are very remarkable compared with the other PPAs. In addition, the absorptance in mode 1 is about nine times compared to its counterpart without the cross-hair. The proposed structure gives a novel inspiration for the design of a tunable dual-band PPA, which can be exploited for plasmonic sensor and other nanophotonic devices.

High-sensitivity plasmonic sensor based on perfect absorber with metallic nanoring structures

2015 ◽  
Vol 63 (2) ◽  
pp. 177-183 ◽  
Author(s):  
Xiaoyuan Lu ◽  
Rengang Wan ◽  
Feng Liu ◽  
Tongyi Zhang
Keyword(s):  
High Sensitivity ◽  
Perfect Absorber ◽  
Plasmonic Sensor

scholarly journals Novel High-Sensitivity Racetrack Surface Plasmon Resonance Sensor Modified by Graphene

Molecules ◽  
2018 ◽  
Vol 23 (7) ◽  
pp. 1726 ◽  
Author(s):  
Jun Zhu ◽  
Zhengjie Xu ◽  
Yuanmin Huang
Keyword(s):  
Electromagnetic Interference ◽  
Structural Parameters ◽  
High Sensitivity ◽  
Nanometer Scale ◽  
Transmission Characteristics ◽  
Plasmonic Sensor ◽  
Large Size ◽  
Scale Temperature ◽  
Resonance Sensor ◽  
Element Theory

In order to overcome the existing challenges presented by conventional sensors, including their large size, a complicated preparation process, and difficulties filling the sensing media, a novel high-sensitivity plasmonic resonator sensor which is composed of two graphene-modified straight waveguides, two metallic layers, and a racetrack nanodisk resonator is proposed in this study. The transmission characteristics, which were calculated by the finite element theory, were used to further analyze the sensing properties. The results of quantitative analysis show that the proposed plasmonic sensor generates two resonance peaks for the different incident wavelengths, and both resonance peaks can be tuned by temperature. In addition, after optimizing the structural parameters of the resonator, the Q value and the refractive sensitivity reached 21.5 and 1666.67 nmRIU–1, respectively. Compared with other studies, these values translate to a better performance. Furthermore, a temperature sensitivity of 2.33 nm/5°C was achieved, which allows the sensor to be easily applied to practical detection. The results of this study can broaden the useful range for a nanometer-scale temperature sensor with ultrafast real-time detection and resistance to electromagnetic interference.

scholarly journals Recent Advances in Plasmonic Sensor-Based Fiber Optic Probes for Biological Applications

2019 ◽  
Vol 9 (5) ◽  
pp. 949 ◽  
Author(s):  
M. Gandhi ◽  
Suoda Chu ◽  
K. Senthilnathan ◽  
P. Babu ◽  
K. Nakkeeran ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Low Cost ◽  
High Sensitivity ◽  
Biological Applications ◽  
Medical Field ◽  
Plasmonic Sensor ◽  
Geometrical Structures ◽  
Plasmonic Sensors ◽  
Fiber Optic Probes ◽  
Transduction Mechanisms

The survey focuses on the most significant contributions in the field of fiber optic plasmonic sensors (FOPS) in recent years. FOPSs are plasmonic sensor-based fiber optic probes that use an optical field to measure the biological agents. Owing to their high sensitivity, high resolution, and low cost, FOPS turn out to be potential alternatives to conventional biological fiber optic sensors. FOPS use optical transduction mechanisms to enhance sensitivity and resolution. The optical transduction mechanisms of FOPS with different geometrical structures and the photonic properties of the geometries are discussed in detail. The studies of optical properties with a combination of suitable materials for testing the biosamples allow for diagnosing diseases in the medical field.

scholarly journals Significantly enhanced coupling effect and gap plasmon resonance in a MIM-cavity based sensing structure

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuan-Fong Chou Chau ◽  
Tan Yu Ming ◽  
Chung-Ting Chou Chao ◽  
Roshan Thotagamuge ◽  
Muhammad Raziq Rahimi Kooh ◽  
...  
Keyword(s):  
Refractive Index ◽  
Plasmon Resonance ◽  
Coupling Effect ◽  
High Sensitivity ◽  
Plasmon Mode ◽  
Plasmonic Sensor ◽  
Lab On Chip ◽  
Silver Nanorods ◽  
Metal Insulator Metal ◽  
On Chip

AbstractHerein, we design a high sensitivity with a multi-mode plasmonic sensor based on the square ring-shaped resonators containing silver nanorods together with a metal–insulator-metal bus waveguide. The finite element method can analyze the structure's transmittance properties and electromagnetic field distributions in detail. Results show that the coupling effect between the bus waveguide and the side-coupled resonator can enhance by generating gap plasmon resonance among the silver nanorods, increasing the cavity plasmon mode in the resonator. The suggested structure obtained a relatively high sensitivity and acceptable figure of merit and quality factor of about 2473 nm/RIU (refractive index unit), 34.18 1/RIU, and 56.35, respectively. Thus, the plasmonic sensor is ideal for lab-on-chip in gas and biochemical analysis and can significantly enhance the sensitivity by 177% compared to the regular one. Furthermore, the designed structure can apply in nanophotonic devices, and the range of the detected refractive index is suitable for gases and fluids (e.g., gas, isopropanol, optical oil, and glucose solution).

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