scholarly journals Refractive Index Sensing Based on Multiple Fano Resonances in a Split-Ring Cavity-Coupled MIM Waveguide

Photonics ◽  
2021 ◽  
Vol 8 (11) ◽  
pp. 472
Author(s):  
Jianfeng Chen ◽  
Hao Yang ◽  
Zhiyuan Fang ◽  
Ming Zhao ◽  
Chenbo Xie
Keyword(s):  
Ring Cavity ◽  
Wide Band ◽  
Fano Resonances ◽  
The Finite Element Method ◽  
Split Ring ◽  
Discrete State ◽  
Continuous State ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
Mim Waveguide

A metal–insulator–metal (MIM) waveguide consisting of a circular split-ring resonance cavity (CSRRC) and a double symmetric rectangular stub waveguide (DSRSW) is designed, which can excite quadruple Fano resonances. The finite element method (FEM) is used to investigate influences of geometric parameters on the transmission characteristics of the structure. The results show that Fano resonances are excited by the interference between the DSRSW and the CSRRC. Among them, the resonance wavelengths of the Fano resonances are tuned by the narrow-band discrete state excited by the CSRRC, and the resonance line transmittance and profiles are tuned by the wide-band continuous state excited by the DSRSW. The sensitivity (S) can be up to 1328.8 nm/RIU, and the figure of merit (FOM) can be up to 4.80 × 104. Based on these advantages, the structure has potential applications in sensing in the sub-wavelength range.

scholarly journals A Nanoscale Structure Based on an MIM Waveguide Coupled with a Q Resonator for Monitoring Trace Element Concentration in the Human Body

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1384
Author(s):  
Tingsong Li ◽  
Shubin Yan ◽  
Pengwei Liu ◽  
Xiaoyu Zhang ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Human Body ◽  
Figure Of Merit ◽  
Refractive Index Sensor ◽  
The Finite Element Method ◽  
Transmission Characteristics ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
Internal Mechanism ◽  
Nanoscale Structure ◽  
Mim Waveguide

In this study, a nano-refractive index sensor is designed that consists of a metal–insulator–metal (MIM) waveguide with a stub-1 and an orthogon ring resonator (ORR) with a stub-2. The finite element method (FEM) was used to analyze the transmission characteristics of the system. We studied the cause and internal mechanism of Fano resonance, and optimized the transmission characteristics by changing various parameters of the structure. In our experimental data, the suitable sensitivity could reach 2260 nm/RIU with a figure of merit of 211.42. Furthermore, we studied the detection of the concentration of trace elements (such as Na+) of the structure in the human body, and its sensitivity reached 0.505 nm/mgdL−1. The structure may have other potential applications in sensors.

scholarly journals Fano Resonance in a MIM Waveguide with Two Triangle Stubs Coupled with a Split-Ring Nanocavity for Sensing Application

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 4972 ◽  
Author(s):  
Xiaoyu Yang ◽  
Ertian Hua ◽  
Mengmeng Wang ◽  
Yifei Wang ◽  
Feng Wen ◽  
...  
Keyword(s):  
Fano Resonance ◽  
Figure Of Merit ◽  
The Finite Element Method ◽  
Split Ring ◽  
Metal Insulator Metal ◽  
Calculation Results ◽  
High Figure ◽  
On Chip ◽  
Mim Waveguide ◽  
Resonance Cavity

Herein, a compact refractive index nanosensor comprising a metal- insulator- metal (MIM) waveguide with symmetric two triangle stubs coupled with a circular split-ring resonance cavity (CSRRC) is theoretically presented. An analysis of the propagation characteristics of the designed structure is discussed employing the finite element method (FEM). The calculation results revealed that a Fano resonance outline emerged, which results from an interaction between the continuous broadband state of the waveguide with two symmetric triangle stubs and the discrete narrowband state of the CSRRC. The influence of geometric parameters on sensing properties was studied in detail. The maximum sensitivity reached 1500 nm/RIU with a high figure of merit of 65.2. The presented structure has great applications for on-chip plasmonic nanosensors.

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.

scholarly journals A Nanostructure with Defect Based on Fano Resonance for Application on Refractive-Index and Temperature Sensing

Sensors ◽  
2020 ◽  
Vol 20 (15) ◽  
pp. 4125
Author(s):  
Xiaoyu Yang ◽  
Ertian Hua ◽  
Hao Su ◽  
Jing Guo ◽  
Shubin Yan
Keyword(s):  
Refractive Index ◽  
Fano Resonance ◽  
Ring Cavity ◽  
Circular Ring ◽  
Temperature Sensing ◽  
Mode Splitting ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
On Chip ◽  
Mim Waveguide

Herein, a nanosensor structure is proposed, which comprises metal-insulator-metal (MIM) waveguide with stub and circular ring cavity with a stub (CRCS). The phenomenon of Fano resonance appears in the transmission spectrum, which is formed by interaction between the narrowband mode of CRCS and broadband mode of stub on bus waveguide. The influence of geometric asymmetry on mode splitting of Fano resonance was discussed. The mode splitting of Fano resonance can vastly improve figure of merit (FOM) with a sight decrease of sensitivity. The best performance of the refractive-index nanosensor is attained, which is 1420 nm/RIU with a high FOM of 76.76. Additionally, the application of designed structure on temperature sensing was investigated, which has sensitivity of 0.8 nm/°C. The proposed structure also possesses potential applications on other on-chip nanosensors.

WAVELENGTH DEMULTIPLEXING IN METAL–INSULATOR–METAL PLASMONIC WAVEGUIDES

2014 ◽  
Vol 28 (04) ◽  
pp. 1450025 ◽  
Author(s):  
XIANKUN YAO
Keyword(s):  
Transmission Efficiency ◽  
Plasmonic Waveguides ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Wavelength Demultiplexing ◽  
Optical Circuits ◽  
Difference Time ◽  
Mim Waveguide

In this paper, we have numerically investigated a novel kind of ultra-compact wavelength demultiplexing (WDM) in high-confined metal–insulator–metal (MIM) plasmonic waveguides. It is found that the drop transmission efficiency of the filtering cavity can be strongly enhanced by introducing a side-coupled cavity in the MIM waveguide. The theoretical analysis is verified by the finite-difference time-domain simulations. Through cascading the filtering units, a highly effective triple-wavelength demultiplexer is proposed by selecting the specific separation between the two coupled cavities of filtering units. Our results may find potential applications for the nanoscale WDM systems in highly integrated optical circuits and networks.

Band-stop filter based on a metal/insulator-disk array/metal structure

2019 ◽  
Vol 33 (20) ◽  
pp. 1950232
Author(s):  
J. L. Duan ◽  
G. Song ◽  
P. L. Lang ◽  
G. Y. Duan ◽  
F. Z. Xie
Keyword(s):  
Stop Band ◽  
Metal Structure ◽  
Metal Insulator ◽  
Disk Array ◽  
Central Wavelength ◽  
Metal Insulator Metal ◽  
Band Stop Filter ◽  
Potential Applications ◽  
Fdtd Methods ◽  
Mim Waveguide

We describe a band-stop filter based on a periodic dielectric-disk array inserted into a metal–insulator–metal (MIM) waveguide. We use finite-difference time-domain (FDTD) methods to study the characteristics of our proposed structure. The results show that there is a flat stop band in the transmission spectrum, in which the transmission is close to zero. The central wavelength of the filter can be controlled by adjusting the lattice constant of the disk array. We discuss the maximum bandwidth and provide a set of parameters suitable for designing a band-stop filter that has a flat stop band-width of approximately 400 nm and a superior on/off ratio. Our structure has potential applications in the design of nanoscale optical devices.

Multiple Fano resonances based on clockwork spring-shaped resonator for refractive index sensing

2021 ◽  
Author(s):  
Jinghui Ding ◽  
Yunping Qi ◽  
Yujiao Yuan ◽  
Haowen Chen ◽  
Weiming Liu ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
High Performance ◽  
Figure Of Merit ◽  
Structural Parameters ◽  
The Finite Element Method ◽  
Resonant Line ◽  
Coupled Mode ◽  
Metal Insulator Metal ◽  
Mim Waveguide ◽  
Best Parameters

Abstract A surface plasmon polarized structure consisting of two metal-insulator-metal (MIM) waveguide coupled with clockwork spring-shaped resonators are constructed in this paper, and its geometric parameters are controlled within a few hundred nanometers. The finite element method (FEM) and multimode interference coupled mode theory (MICMT) are used to simulate and theoretically calculate the optical response of the designed structure. By modifying the structural parameters of the system, the influence on the asymmetry of the Fano resonance line is studied. The changes of the transmission spectra at different refractive indexes are also investigated. Based on this asymmetric resonant line, the sensitivity and FOM* (figure of merit) value of the cavity with different parameters are measured. The sensitivity and FOM* under the best parameters are 1200 nm/RIU and 191.6, respectively. The surface plasmon structure proposed and the results in this paper are promising for applications in the field of high-performance sensing and micro-nano optical devices.

An optical pressure sensor based on π-shaped surface plasmon polariton resonator

2016 ◽  
Vol 30 (21) ◽  
pp. 1650284 ◽  
Author(s):  
Gaoyan Duan ◽  
Peilin Lang ◽  
Lulu Wang ◽  
Li Yu ◽  
Jinghua Xiao
Keyword(s):  
Surface Plasmon ◽  
Pressure Sensor ◽  
Surface Plasmon Polariton ◽  
High Sensitivity ◽  
Wavelength Shift ◽  
The Finite Element Method ◽  
Metal Insulator Metal ◽  
Potential Applications ◽  
Plasmon Polariton ◽  
Optical Pressure

We propose a metal–insulator–metal (MIM) structure which consists of a [Formula: see text]-shaped resonator and a surface plasmon polariton (SPP) waveguide. The finite element method (FEM) is employed in the simulation. The results show that this structure forms an optical pressure sensor. The transmission spectra have a redshift with increasing pressure, and the relation between the wavelength shift and the pressure is linear. The nanoscale pressure sensor shows a high sensitivity and may have potential applications in biological and biomedical engineering.

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 Plasmonic nanosensor based on multiple independently tunable Fano resonances

2019 ◽  
Vol 10 ◽  
pp. 2527-2537 ◽  
Author(s):  
Lin Cheng ◽  
Zelong Wang ◽  
Xiaodong He ◽  
Pengfei Cao
Keyword(s):  
Slow Light ◽  
Optical Switches ◽  
Fano Resonances ◽  
The Finite Element Method ◽  
Practical Application ◽  
Split Ring ◽  
Design Concepts ◽  
Plasmonic Structures ◽  
On Chip ◽  
Plasmonic Nanosensor

A novel refractive index nanosensor with compound structures is proposed in this paper. It consists of three different kinds of resonators and two stubs which are side-coupled to a metal–dielectric–metal (MDM) waveguide. By utilizing numerical investigation with the finite element method (FEM), the simulation results show that the transmission spectrum of the nanosensor has as many as five sharp Fano resonance peaks. Due to their different resonance mechanisms, each resonance peak can be independently tuned by adjusting the corresponding parameters of the structure. In addition, the sensitivity of the nanosensor is found to be up to 1900 nm/RIU. For practical application, a legitimate combination of various different components, such as T-shaped, ring, and split-ring cavities, has been proposed which dramatically reduces the nanosensor dimensions without sacrificing performance. These design concepts pave the way for the construction of compact on-chip plasmonic structures, which can be widely applied to nanosensors, optical splitters, filters, optical switches, nonlinear photonic and slow-light devices.

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