In this Letter, we report TAMM plasmonic polaritons (TPPs) generated by few-layer MoS with a distributed Bragg reflector (DBR) structure in the terahertz frequency region by utilizing the transfer matrix method (TMM) and finite element method (FEM). By inserting a mono-graphene embedded cavity layer, we realize the graphene-induced mode strong coupling (GCM), which is a strategy of a refractive index sensor by optimizing the cavity layer spacing. By adjusting the chemical potential of graphene, GCM is modulated. μ = 0.1 eV and μ = 0.9 eV are selected as the on-off-state parameters, respectively. The difference in reflectance spectra presents a differential signal and a self-reference operation. The sensitivity of the designed refractive index sensor is 7.8 THz/RIU and a figure of merit (FOM) of 882 RUI can be obtained. The proposed structure in our Letter demonstrates its potential application in high-performance self-reference refractive index sensors.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OL.540235 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Development of an advanced multimode refractive index plasmonic optical sensor utilizing split ring resonators for brain cancer cell detection.
Sci Rep
January 2025
Department of Chemical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran.
In this paper, we propose and theoretically investigate a novel multimode refractive index (MMRI) plasmonic optical sensor for detecting various brain cancer cells, leveraging the unique capabilities of split ring resonators (SRRs). The sensor, simulated using the finite-difference time-domain (FDTD) method, exhibits dual resonance modes in its reflection spectrum within the 1500 nm to 3500 nm wavelength range, marking a significant advancement in multimode plasmonic biosensing. Through detailed parametric analysis, we optimize critical dimensional parameters to achieve superior performance.
View Article and Find Full Text PDFInnovative MIM diplexer with neural network enhanced refractive index detection for advanced photonic applications.
Sci Rep
December 2024
College of Education, Department of Physics, Misan University, Amarah, Iraq.
This study introduces a high-performance 4-channel Metal-Insulator-Metal (MIM) diplexer, employing silver and Teflon, optimized for advanced photonic applications. The proposed diplexer, configured with two novel band-pass filters (BPFs), operates across four distinct wavelength bands (843 nm, 1090 nm, 1452 nm, 1675 nm) by precisely manipulating the passband dimensions. Utilizing Finite-Difference Time-Domain (FDTD) simulations, the designed diplexer achieves exceptional sensitivity values of 3500 nm/RIU, 4250 nm/RIU, 3375 nm/RIU, and 4003 nm/RIU, along with high figures of merit (FOM) ranging from 113.
View Article and Find Full Text PDFZnO-Nafion assisted optical fiber dual-SPR biosensor for simultaneous detection of urea and uric acid concentrations.
Biosens Bioelectron
March 2025
College of Information Science and Engineering, Northeastern University, Shenyang, 110819, China; Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao, 066004, China.
A novel dual-parameter optical fiber biosensor based on surface plasmon resonance (SPR) for simultaneous measurement of urea and uric acid concentrations is proposed in this paper. Based on the principle of positive and negative electric combination, ZnO nanoparticles is selected as the matrix for immobilizing urease and uricase with selective recognition ability, which can also be used as a sensitizing material to increase the refractive index detection sensitivity of SPR by 22%. Then, Nafion ion exchange membrane was introduced to wrap the urea sensing area to avoid crosstalk caused by the overlap of adjacent sensing areas.
View Article and Find Full Text PDFA highly optimized and sensitive bowtie shape-based SPR biosensor for different analyte detection.
Nanoscale Adv
December 2024
Department of Electrical and Electronic Engineering, Rajshahi University of Engineering & Technology Rajshahi-6204 Bangladesh
With advancements in photonic technologies, photonic crystal fibers (PCFs) have become crucial components in developing highly sensitive and efficient biosensors. This paper presents an optimized bowtie-shaped PCF biosensor that leverages surface plasmon resonance (SPR) phenomena for enhanced refractive index (RI) sensing. The proposed design uses an external sensing mechanism to effectively characterize performance across an RI range of 1.
View Article and Find Full Text PDFHyperbolic-Metamaterial-Based Optical Fiber SPR Sensor Enhanced by a Smart Hydrogel for Perspiration pH Measurements.
Nano Lett
December 2024
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Guangzhou 510632, P. R. China.
Article Synopsis
- An optical fiber SPR sensor has been developed using hyperbolic metamaterials and pH-sensitive hydrogels to detect pH levels in sweat.
- The sensor boasts high refractive index sensitivity (6963.64 nm RIU) and pH sensitivity, particularly in the ranges of 2.7-4.7 and 4.7-7.5.
- It shows excellent pH selectivity over other sweat constituents like urea and glucose, along with strong operational stability, making it promising for health monitoring and medical applications.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!