Plasmonic nanohole arrays (NHAs) exhibit extraordinary optical transmission (EOT) evoked by resonant excitation of surface plasmons at an excitation wavelength, which is highly sensitive to changes in refractive index in the surrounding dielectric. This can enable the use of plasmonic NHAs in on-chip refractive index sensors. Such sensors can be realized on the cost-effective...
The angular surface plasmon resonance (ASPR) sensor can be improved theoretically in the ways presented in this publication. The mainstay of these ways is based on a comparative study of (ASPR) sensors to introduce developed (ASPR) sensors with high performances. In addition, showing how the MoS2 as a hosting medium in Ag nanocomposite enhanced the properties of (ASPR) sensors...
Plantago lanceolata is a traditional medicinal plant that has attracted significant interest from researchers due to the use of its physiologically active components, particularly polyphenolics (flavonoids, hydroxycinnamic acids), in various fields. The aim of this study is to synthesize iron oxide (PLE@FeNPs) nanoparticles using a green synthesis approach with Plantago...
Surface plasmon resonance (SPR) sensors are crucial for highly sensitive, label-free detection in various applications, including biosensing and environmental monitoring. This study investigates the sensitivity and performance of diffraction grating-based SPR sensors using rigorous coupled wave analysis (RCWA). The analysis focuses on single- and bi-layered metallic structures...
In this study, a MXene-based electromagnetic absorber with a simple design at terahertz frequencies is proposed. An absorber that has a MXene layer drilled into with square and circular cavities and a thin aluminum layer as a reflector was examined. With the proper design of the structure dimensions, a MXene-based refractive index sensor with a dual-band at THz frequency and $$99...
Compared to surface plasmon polariton in metals, graphene can support transverse electric (TE) surface modes when the imaginary part of its conductivity is negative. TE graphene plasmons are generally weakly confined in direction perpendicular to the graphene plane, and they cannot be resonantly excited by an external incident wave because their dispersion curve spectrally lies...
The photonics community is getting more involved in plasmonic detectors that detect light. Plasmonics permits lighting to be directed into microscopic areas in metal frameworks; this feature might imitate further advancements in the effectiveness of detectors that detect light. Plasmonic nanostructures may alter light at a subwavelength scale and have been seen as an effective...
This work discusses the three-dimensional hybrid system of three metal nano-ellipsoids and semiconductor quantum dot to obtain the energy absorption rate caused by the direct and indirect contribution of the interaction between the semiconductor quantum dot and the three metal nano-ellipsoids. We investigate the interaction between excitons and surface plasmons by applying three...
Localized surface plasmon resonance (LSPR) is a nanoscale phenomenon associated with noble metal nanostructures that has long been studied and has gained considerable interest in recent years. These resonances produce sharp spectral absorption and scattering peaks, along with strong electromagnetic near-field enhancements. Over the past decade, advancements in the fabrication of...
Plasmonic sensors utilizing metal–insulator-metal (MIM) waveguides represent a significant advancement in sensing technology due to their high sensitivity and versatility. These sensors leverage surface plasmon polaritons to detect minute changes in the surrounding environment, making them highly effective for a range of applications. For instance, they can precisely measure...
Modeling slot waveguides using the analogy with transmission lines in microwaves proved itself to be an accurate and simple method for characterizing plasmonic field propagation. Here, the possibility of generalizing the applicability of this method to plasmonic circuits consisting of nanowires is analyzed. It is found that it can be applied as long as the circuit can be divided...
Two plasmonic nanoantenna configurations—nanodisk and nanostrip arrays—in a metal–insulator-metal (MIM) setup were proposed, optimized, and compared by simulating their optical properties in three-dimensional models using COMSOL Multiphysics software. The optical responses, including electric field enhancement, absorption, reflection, and transmission spectra, were systematically...
In this work, we propose a THz metamaterial for biomedical applications. The full vectorial finite element method is used to design and analyze the reported biosensor. The proposed sensor is based on increasing the confinement of the electric and magnetic fields at the analyte layer at the resonance frequency. Hence, any slight variation of the optical properties of the analyte...
We study the properties of the three-dimensional hybrid system consisting of three metal nano-ellipsoids and semiconductor quantum dots. Our objective is to determine the energy absorption rate of the three metal nano-ellipsoids caused by the indirect contribution of the interaction between the semiconductor quantum dot and the three metal nano-ellipsoids. We compare two...
We propose a generalized formula for calculating the dipole polarizability of spherical multilayer nanoshells (MNSs) within the long-wavelength approximation (LWA). Given a MNS with a finite number of concentric layers, radii, and dielectric properties, embedded in a dielectric medium, in the presence of a uniform electric field, we show that its frequency-dependent and complex...
Nowadays, early cancer identification and surveillance have become vital problems. This research paper explores the development of a small, three-band sensor harnessing the potential of terahertz (THz) technology and metamaterials (MTMs) to diagnose blood cancer. The proposed sensor holds the promise of a paradigm shift in the diagnosis of blood cancer by offering a non-invasive...
The combination of photonic crystal fiber (PCF) and graphene-supporting surface plasmon polaritons (SPP) presents a new approach to achieving a plasmonic sensor with adjustable properties in the terahertz (THz) frequency range. In this study, we investigate a liquid-core PCF-based graphene plasmonic sensor, where the analyte to be detected is located on both the sensing layer...