scholarly journals High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS2 Nanowires Array Layer with Graphene Oxide Nanosheet

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Shiliang Guo ◽  
Xiaogang Wu ◽  
Zhiquan Li ◽  
Kai Tong
Keyword(s):  
Finite Element Method ◽  
Refractive Index ◽  
High Sensitivity ◽  
Metal Nanowires ◽  
The Finite Element Method ◽  
Spr Biosensor ◽  
Coupling Structure ◽  
Graphene Oxide Nanosheet ◽  
Medium Layer ◽  
Nanowires Array

A novel SPR biosensor that can achieve a high sensitivity is proposed; therefore, a new prism coupling structure based on metal nanowires array layer is designed in this paper. The thickness of each medium layer for the structure is analyzed to obtain the optimal SPR spectrum, by the finite element method, so that the sensitivity is able to be enhanced greatly. The optimal thicknesses of each medium layer are given, and the sensitivity of the SPR biosensor can reach as high as 210.75°/RIU for the refractive index of the sensing medium, from 1.30 to 1.38.

scholarly journals Research on Characteristics of Broadband Acoustic Sensor Based on Silicon-Based Grooved Microring Resonator

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1338
Author(s):  
Jiangong Cui ◽  
Yaxin Yu ◽  
Xiaoxia Chu ◽  
Rongyu Zhao ◽  
Min Zhu ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Refractive Index ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Acoustic Sensor ◽  
The Finite Element Method ◽  
Index Method ◽  
Bending Radius ◽  
Small Structure ◽  
Silicon Based

In order to meet the requirements of having a small structure, a wide frequency band, and high sensitivity for acoustic signal measurement, an acoustic sensor based on a silicon-based grooved microring resonator is proposed. In this paper, the effective refractive index method and the finite element method are used to analyze the optical characteristics of a grooved microring resonator, and the size of the sensor is optimized. The theoretical analysis results show that, when the bending radius reaches 10 μm, the theoretical quality factor is about 106, the sensitivity is 3.14 mV/Pa, and the 3 dB bandwidth is 430 MHz, which is three orders of magnitude larger based on the sensitivity of the silicon-based cascaded resonator acoustic sensor. The sensor exhibits high sensitivity and can be used in hydrophones. The small size of the sensor also shows its potential application in the field of array integration.

scholarly journals Influence Metal Berylliumof the Optical FiberCoreon plasmonic Properties

2021 ◽  
Vol 2114 (1) ◽  
pp. 012008
Author(s):  
Hussein Taqi John
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Mathematical Program ◽  
Propagation Constant ◽  
Comsol Multiphysics ◽  
Power Ratio ◽  
The Finite Element Method ◽  
The Core ◽  
Beryllium Metal

Abstract The paper include, the properties of the plasmonic optical fiber in which the core is beryllium metal were studied, were we studied the effect of this metal on the plasmonic fiber, and a mathematical program was used which is COMSOL MULTIPHYSICS, which depends on the finite element method (FEM) to deduce the first three modes and the effective refractive index, neff accompanying each wavelength. It was observed that when order the mode is increased, the lobes will increase, where the mode, LP 01 is one spot and the mode, LP11 are two spots and the mode, LP21 are four spots. An increase in the power indicator is increase red and yellow, and this applies to all modes. That is, by controlling the radius of the fiber core and the wavelength, it is possible to equilibrium the power ratio that propagates forward and backward. The neff , attenuation coefficient and propagation constant for different wavelengths and core radii for the first three modes were also studied. In all cases, we got the higher values when the wavelengths are small the value, and then these values begin to reduction at increasing wavelength.

scholarly journals A Plasmonic Structure of Fano Resonance in the MIM Waveguide with r-Shaped Resonator for Refractive Index Sensor

2022 ◽  
Author(s):  
Siti Rohimah ◽  
He Tian ◽  
Jinfang Wang ◽  
Jianfeng Chen ◽  
Jina Li ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Fano Resonance ◽  
Geometrical Parameters ◽  
Fano Resonances ◽  
The Finite Element Method ◽  
Plasmonic Structure ◽  
Mim Waveguide ◽  
Element Method

Abstract A plasmonic structure of metal-insulator-metal (MIM) waveguide consisting of a single baffle waveguide and an r-shaped resonator is designed to produce Fano resonance. The finite element method uses the finite element method to analyze the transmission characteristics and magnetic field distributions of the plasmonic waveguide distributions. The simulation results exhibit two Fano resonances that can be achieved by the interference between a continuum state in the baffle waveguide and a discrete state in the r-shaped resonator. The Fano resonances can be simply tuned by changing geometrical parameters of the plasmonic structure. The value variations of geometrical parameters have different effects on sensitivity. Thus, the sensitivity of the plasmonic structure can achieve 1333 nm/RIU, with a figure of merit of 5876. The results of the designed plasmonic structure offer high sensitivity and nano-scale integration, which are beneficial to refractive index sensors, photonic devices at the chip nano-sensors, and biosensors applications.

scholarly journals A MIM Waveguide Structure of a High-Performance Refractive Index and Temperature Sensor Based on Fano Resonance

2021 ◽  
Vol 11 (22) ◽  
pp. 10629
Author(s):  
Pengwei Liu ◽  
Shubin Yan ◽  
Yifeng Ren ◽  
Xiaoyu Zhang ◽  
Tingsong Li ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Performance ◽  
Figure Of Merit ◽  
High Sensitivity ◽  
Wide Band ◽  
Destructive Interference ◽  
The Finite Element Method ◽  
Transmission Characteristics ◽  
Metal Insulator Metal ◽  
Mim Waveguide

A plasmonic refractive index nanosensor structure consisting of a metal-insulator-metal (MIM) waveguide with two symmetrical rectangle baffles coupled with a connected-concentric-double rings resonator (CCDRR) is presented. In this study, its transmission characteristics were investigated using the finite element method (FEM). The consequences, studied via simulation, revealed that the transmission spectrum of the system presents a sharp asymmetric Fano profile due to the destructive interference between the wide-band mode of two rectangle baffles on the bus waveguide and the narrow-band mode of the CCDRR. The effects of the geometric parameters of the structure on the transmission characteristics were investigated comprehensively. A sensitivity of 2260 nm/RIU and figure of merit (FOM) of 56.5 were the best levels of performance that the designed structure could achieve. In addition, the system could act as a sensor for use for temperature sensing, with a sensitivity that could reach 1.48 nm/°C. The designed structure advances with technology with new detection positions and has good application prospects in other high-sensitivity nanosensor fields, for example, acting as a biosensor to detect the hemoglobin level in the blood.

Multi-band Terahertz Chiral Metamaterials Based on Complementary Cross-wire Structure

2013 ◽  
Vol 455 ◽  
pp. 137-141 ◽  
Author(s):  
Pan Zhang ◽  
Zheng Ze Cheng ◽  
Hong Xu Cao
Keyword(s):  
Finite Element Method ◽  
Refractive Index ◽  
Negative Refractive Index ◽  
The Finite Element Method ◽  
Chiral Metamaterials ◽  
Terahertz Region ◽  
Fem Method ◽  
Potential Applications ◽  
Cross Wire ◽  
Multi Band

In this paper, a multi-band chiral metamaterials (CMMs) based on complementary cross-wire structure is proposed and studied numerically. The finite element method (FEM) method was used to simulate the EM properties of the designed structure. Numerical results indicate that the giant optical activity and multiband negative refractive index can be realized in terahertz region. The proposed CMMs may have some potential applications in novel terahertz device.Particle size of bayerite (d50) was about 24 μm. Al2O3was obtained after calcination at 1050 °C for 1.5 h.

Reconstruction of refractive index profile of optical waveguides by the finite element method

2004 ◽  
Author(s):  
Sigifredo Solano G. ◽  
Catalina A. Ramirez ◽  
Javier Morales ◽  
Pedro I. Torres ◽  
Nicolas A. Gomez Montoya
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Optical Waveguides ◽  
Refractive Index Profile ◽  
The Finite Element Method ◽  
Index Profile ◽  
Element Method

scholarly journals Bent-Bent Waveguide Coupling System

2021 ◽  
Vol 3 (1) ◽  
pp. 9-12
Author(s):  
João Paulo N. Torres ◽  
António Baptista ◽  
Vitor Maló Machado ◽  
Ricardo A. Marques Lameirinhas
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Refractive Index ◽  
Energy Transfer ◽  
The Finite Element Method ◽  
Energy Rate ◽  
Coupling System ◽  
Waveguide Coupling ◽  
Bent Waveguides ◽  
Element Method

In this paper, the mechanism of energy transfer between two bent-bent waveguides is analyzed. Focus is done to the effect that some parameters like the refractive index of the substrate and the wavelength cause in the energy rate transfer between the waveguides. Results were validated by using the Finite Element Method (FEM).

scholarly journals Performance of compliant mechanisms applied to a modified shape accelerometer of single and double layer

2019 ◽  
Vol 9 (6) ◽  
pp. 4675
Author(s):  
Margarita Tecpoyotl-Torres ◽  
Ramon Cabello-Ruiz ◽  
Pedro Vargas-Chable ◽  
Jose Gerardo Vera-Dimas ◽  
Alejandra Ocampo-Diaz
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Compliant Mechanisms ◽  
High Sensitivity ◽  
The Finite Element Method ◽  
Capacitive Accelerometer ◽  
Displacement Sensitivity ◽  
Soi Technology ◽  
Plane Mode ◽  
Operation Frequency

<span>Accelerometers are widely used in several mechanisms of high sensitivity. They are employed for example in tilt-control in spacecraft, inertial navigation, oil exploration, seismic monitoring, etc. In order to improve the sensitivity of the measurements, implementation of Displacement-amplifying Compliant Mechanisms (DaCMs) in a capacitive accelerometer have been reported in the literature. In this paper, a system composed of two elements; capacitive accelerometer with extended beams (CAEB) and a DaCM geometry, of single and souble layer, are analysed. Three materials were considered, in the case, for the second layer. The DaCM implementation improves the operation frequency and displacement sensitivity, under different proportions, at the same time. Furthermore, three sweeps were performed: a range of thickness from 25 µm up to 30 µm (to determine the appropriate silicon mass value, using SOI technology), a range of second layer thickness (to choose the more appropriate material and its thickness) and a range of gravity values (to determine the maximum normal stress in the beams, which defines the superior value of the g operation range). The in-plane mode (y-axis) was considered in all analysed cases. This characterization was developed using the Finite Element Method. Structural and modal analysis responses were under study.</span>

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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