Ordered Arrays of Ultrafine Au Nanoprisms by Means of Nanosphere Lithography and Ion Hammering Effect
AbstractThe search for new nanomaterials with precisely customized optical and geometric characteristics is highly suitable for potential applications in nanophotonics and optoelectronics. In this work, ordered arrays of ultrafine Au nanoprisms on silicon substrates were prepared by combining nanosphere lithography with the ion hammering effect. Indeed, the silica particle lithographic masks were previously irradiated with 4 MeV Si+ ions to modify and tune the mask interstice size. An extensive analysis of the samples by SEM and AFM determined the geometrical properties and the narrow average size of the ultrafine Au nan...
Source: Plasmonics - April 1, 2024 Category: Biomedical Science Source Type: research
Geometrical Optimization of 2D MoS2-Ag Rectangular and Triangular Grating for Enhanced Solar Cell Efficiency
This study introduces a novel investigation into the use of MoS2-Ag rectangular and triangular grating structures to achieve this goal. Performing finite element analysis with the COMSOL 5.3a RF module provides the possibility to explore the impact of various silver (Ag) grating configurations on the absorption of light in photovoltaic (PV) cells. In order to find the best combination of MoS2 thickness, slit width, and metallic grating while keeping the periodicity of the grating device unchanged, an optimum value is calculated. The zeroth-order transmission spectra and near-field plots of the Fano-resonance (dip) assoc...
Source: Plasmonics - March 30, 2024 Category: Biomedical Science Source Type: research
Laguerre-Gaussian Laser Beam Second Harmonic Generation in Arrays of Vertically Aligned Carbon Nanotube
AbstractIn this present work, we have studied second harmonic generation by nonlinear interaction of Laguerre-Gaussian laser in arrays of vertically aligned carbon nanotubes. These arrays of carbon nanotube are organized in a dielectric surface and the interaction of Laguerre-Gaussian laser beam is taken perpendicularly to the length of carbon nanotube. As the Laguerre-Gaussian laser beam field interacts with carbon nanotube arrays, the nonlinearity in the medium is arisen by electrostatic restoration force and causes the excursion in electron cylinder with respect to ion cylinder. The nonlinearity results the second and t...
Source: Plasmonics - March 30, 2024 Category: Biomedical Science Source Type: research
Numerical Investigations of SPPs at Chiroferrite-Metal Interface
AbstractWe have developed a theoretical model to explore some novel features of surface plasmon polaritons (SPPs) at the chiroferrite-metal planar interface. The dispersion relation has been calculated by applying boundary conditions at\(x\;=\;0\) on EM fields component of chiroferrite and metal medium. Numerical investigations have been conducted to study electromagnetic surface waves properties such as effective mode index, propagation loss, phase velocity, and propagation length versus angular frequency. It is shown that the EM surface waves traits for the proposed structure are very sensitive to chiroferrite features, ...
Source: Plasmonics - March 28, 2024 Category: Biomedical Science Source Type: research
A Graphene Gold Metasurface Inspired Surface Plasmon Resonance Sensor Designed for Terahertz Applications in Sensing and Detection of Heavy Metals in Water
This study presents a meta surface-based sensor specifically engineered to detect Cu2+ and Mg2+ ions in drinking water. Employing COMSOL Multiphysics simulations, the graphene-gold sensor demonstrates exceptional performance by maintaining consistent resonance stability and heightened sensitivity, achieved through optimized design parameters. The analysis of signals and the accuracy of detection demonstrates the sensor ’s reliability in identifying minute concentrations, reaching as low as 0.257 mol/kg for Cu2+ and 0.394 mol/kg for Mg2+. The establishment of strong linear correlations, with R2 scores of 0.989993 and 0...
Source: Plasmonics - March 28, 2024 Category: Biomedical Science Source Type: research
Bismuthene-Coated Fiber-Optic Plasmonic Sensor: Theoretical Foundation for the Experimental Detection of Human Colorectal Cancer
AbstractIn this paper, we propose an approach to the detection of colorectal cancer (CRC) using an uncladded fiber optic plasmonic sensor with the help of silver thin film and a bismuthene nanolayer. Bovine serum albumin (BSA) is coated over bismuthene to provide favorable conditions for the attachment of path mucosa. The colorectal tissue sample is made up of the interstitial fluids (ISF) and different scatterers. In this paper, the volume fraction of scatterers in the pathological tissue sample (fSP) is varied from 35 to 75%. Performance-defining parameters such as resonance wavelength ( λr), shift in λr ( δλr), mini...
Source: Plasmonics - March 28, 2024 Category: Biomedical Science Source Type: research
Silver Nanoparticles Decorated Wide Band Gap MoS2 Nanosheet: Enhanced Optical and Electrical Properties
AbstractMetal nanoparticles decorated molybdenum disulfide (MoS2) nanosheets have received great attention of researchers due to their potential applications in biosensing, optoelectronics, photocatalysis, SERS, etc. Here, we report the enhanced optical and electrical properties of wide band gap MoS2 nanosheets decorated with silver nanoparticles (Ag-MoS2 nanosheets). Field emission scanning electron spectroscopy (FESEM) images reveal the formation of well-shaped MoS2 nanosheet-like structures decorated with silver nanowires. MoS2 nanosheets are 27.9 μm long and 12.9 μm wide and the thickness is in the range of nanome...
Source: Plasmonics - March 28, 2024 Category: Biomedical Science Source Type: research
Optimizing Carbon-Based Perovskite Solar Cells with Pyramidal Core –Shell Nanoparticles for High Efficiency
AbstractCarbon-based perovskite solar cells (C-PSCs) have gained attention due to their cost-saving, achieved by eliminating expenses associated with organic materials, hole transport layers (HTL), and metallic contacts. Furthermore, they exhibit improved stability compared to counterparts utilizing HTL/metallic contact interfaces. However, the power conversion efficiency (PCE) of free HTL C-PSCs falls notably lower than their HTL/metallic contact counterparts. In the initial phase of this study, we introduce pyramid-shaped plasmonic nanoparticles (NPs) and utilize them in the photoactive region to enhance the PCE of free ...
Source: Plasmonics - March 27, 2024 Category: Biomedical Science Source Type: research
Corrugated Gold Tip as Optical Tweezers to Apply Force on Zinc Sulphide Quantum Dot Nanoparticle
AbstractOne of the most important issues after synthesizing colloidal quantum dot nanoparticles is how to use them. In some cases, a very small number of these nanoparticles is needed. One of the ways to remove small amounts of these nanoparticles is to use a tip-shaped plasmonic optical tweezer made of metal. This work is dedicated to the improvement of the near-field enhancement beneath the tip apex due to delocalized plasmon excitation on a sub-wavelength grating engraved on the tip and nanofocusing of these plasmons. All the simulations of electromagnetic wave scattering on the nanoantenna are based on the finite diffe...
Source: Plasmonics - March 26, 2024 Category: Biomedical Science Source Type: research
Efficient SnS Solar Cells via Plasmonic Light Trapping and Alternative Buffer Layers: A Combined Machine Learning and FDTD Analysis
AbstractIn this work, we propose a novel design framework based on combined finite-difference time-domain (FDTD) simulations and machine learning (ML) analysis, aiming to improve the light trapping and carrier transport management in the SnS-based thin-film solar cells (TFSCs). The present study aims to identify the key governing solar cell parameters throughout the structure designing processes in order to apply them to develop efficient eco-friendly SnS TFSCs. In this regard, a new SnS solar cell structure based on alternative electron transport layers (ETLs) combined with plasmonic-based light management approach is pro...
Source: Plasmonics - March 26, 2024 Category: Biomedical Science Source Type: research
Harnessing Tamm-Plasmon Polaritons in Cantor Sequence Photonic Quasicrystals for Enhanced Cancer Cell Detection
AbstractIn this paper, we present a novel approach for cancer cell detection using the Cantor sequence-based Tamm plasmon polariton (TPP) platform, addressing the critical challenge of accurate and timely identification in medical diagnostics. The TPP platform, leveraging its unique interaction with electromagnetic waves, exhibits enhanced sensitivity to subtle changes in the surrounding environment ’s refractive index. We investigated two distinct cancer cell types, Jurkat and HeLa, through comprehensive theoretical analysis, examining the platform’s response to variations in refractive index induced by cancer cells. ...
Source: Plasmonics - March 23, 2024 Category: Biomedical Science Source Type: research
Tuning Sensitivity of Surface Plasmon Resonance Sensor Based on Bi-metallic, Antimonene, and Carbon Nanotube for Tuberculosis Detection
AbstractTuberculosis (TB) is a major cause of death. Early detection of TB is difficult, so the new technologies are demanding for diagnostics. The proposed sensor detects TB germs using the surface plasmon resonance (SPR) phenomenon. The proposed work consists of silver, platinum, antimonene, and carbon nanotube between coupling prism BK7 and sensing medium. The transfer matrix method (TMM) has been used for analysing the suggested sensor. The angular interrogation method is employed with the attenuation total reflection (ATR) technique. The COMSOL Multiphysics software has calculated the electric field distribution betwe...
Source: Plasmonics - March 23, 2024 Category: Biomedical Science Source Type: research
Dielectric Loaded MXene Plasmon Waveguide for Subwavelength Confinement at 1550 nm
AbstractMXenes are a recently identified class of two-dimensional materials with exceptionally promising features for use in next-generation optoelectronic applications. Particularly, it provides the versatility to create plasmon resonances ranging from the near-infrared to the mid-infrared, which attracts ever-increasing attention. In this work, a single dielectric-loaded MXene (Ti\(_3\)C\(_2\)T\(_x\)) plasmon waveguide is proposed and investigated. The structure of the dielectric-loaded MXene waveguide consists of a substrate, a dielectric strip, and MXene thin films. The MXene plasmon waveguide is theoretically analyzed...
Source: Plasmonics - March 22, 2024 Category: Biomedical Science Source Type: research
Graphene-Based Wide-Angle Surface Plasmon Resonance Titanium Solar Thermal Absorber Using Fe-Fe2O3 Materials
AbstractThe need for renewable energy is increasing as the energy demand is surging day by day. Industrial heaters can be operated using solar thermal heaters which can be used as renewable energy source. We proposed the new design of an effective solar thermal absorber with a graphene addition in three-layer constructions by using titanium (Ti) in three cylinder-shaped resonators, iron (Fe) for the substrate layer, and ferric oxide (Fe2O3) in the ground layer construction. The design is able to absorb the heat of solar and convert it to thermal energy which can be used for industrial heaters. The constructed design can ev...
Source: Plasmonics - March 22, 2024 Category: Biomedical Science Source Type: research
Extinction Behavior and Near-Field Enhancement of 3D Hybrid Nanostructures Consisting of Ag-Coated SiO2 Nanorods
AbstractThe optical property of three-dimensional (3D) hybrid nanostructures consisting of Ag-coated SiO2 nanorods (Ag-SiO2 NRs) is studied by a method of finite-difference time-domain calculations. In the visible-light to infrared band, the extinction spectra of single Ag-SiO2 NRs are basically dominated by three surface plasmon resonance (SPR) peaks. By calculating the electric fields of Ag-SiO2 NRs excited by the incident light in resonance with the three SRP peaks, the plasmons are identified to originate from the electronic oscillation located at the bottom, the side surface, and the top, respectively, different from ...
Source: Plasmonics - March 22, 2024 Category: Biomedical Science Source Type: research
