A5046821833- Plasmonic and Surface Plasmon Research
- Photonic and Optical Devices
- Photonic Crystals and Applications
- Mechanical and Optical Resonators
- Gold and Silver Nanoparticles Synthesis and Applications
- Optical Coatings and Gratings
- Acoustic Wave Phenomena Research
- Nanopore and Nanochannel Transport Studies
- Quantum optics and atomic interactions
- Acoustic Wave Resonator Technologies
- Metamaterials and Metasurfaces Applications
- Ultrasonics and Acoustic Wave Propagation
- Thermal Radiation and Cooling Technologies
- Advanced MEMS and NEMS Technologies
- Orbital Angular Momentum in Optics
- Electrochemical Analysis and Applications
- Nanoporous metals and alloys
- Microfluidic and Bio-sensing Technologies
- Optical Network Technologies
- Electrochemical sensors and biosensors
- Lipid Membrane Structure and Behavior
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Antenna and Metasurface Technologies
- Random lasers and scattering media
- Semiconductor Lasers and Optical Devices
Mohamed I University
2016-2024
Université de Lille
2009-2023
Institut d'électronique de microélectronique et de nanotechnologie
2009-2023
Premier University
2019-2022
Centre Hospitalier Universitaire d’Oujda
2020
École Normale Supérieure de Tétouan
2016
Abdelmalek Essaâdi University
2016
University of Southampton
2016
École Centrale de Lille
2010
Centre National de la Recherche Scientifique
2009-2010
Numerical simulations, based on a finite-difference-time-domain (FDTD) method, of infrared light propagation for add/drop filtering in two-dimensional (2D) metal–insulator–metal (Ag–SiO2–Ag) resonators are reported to design 2D Y-bent plasmonic waveguides with possible applications telecommunication wavelength demultiplexing (WDM). First, we study optical transmission and reflection nanoscale SiO2 waveguide coupled nanocavity the same insulator located either inside or side linear sandwiched...
The paper reports on the use of Lorentz-Drude model to investigate optical behavior a novel multilayer localized surface plasmon resonance (LSPR) interface. plasmonic interface consists random array gold nanostructures (Au NSs) formed by thermal deposition 4 nm thick film glass, postannealed at 500 °C for 1 min, and coated with two different dielectric layers, silicon dioxide (SiOx) nitride (Si3N4), varying thickness. Atomic force microscopy scanning electron were used determine average...
This paper reports on the use of Lorentz−Drude model to investigate refractive index sensitivity, S (change nanometer per unit, in nm RIU−1) multilayered localized surface plasmon resonance (LSPR) interfaces. The investigated interface consists an array gold nanostructures (Au NSs) glass (n1 = 1.51) coated with dielectric overlayers different (n2 1.45−2.63) and varying thickness (0−300 nm). These interfaces are contact solvents (n3 1.000−1.630). sensitivity for architectures n1≤ n2 is found...
The propagation and filtering of surface plasmon polaritons in metal-insulator-metal nanosandwiches are investigated by using finite-difference time domain simulation. We study the optical transmission a nanoscale waveguide coupled to cavity situated either vicinity or interior waveguide. Depending on whether is inside at side waveguide, spectrum displays respectively peaks dips which occur same frequencies. dip peak frequencies as function geometrical parameters thickness metallic gap...
In this study, we investigate localized and resonant optical waves associated with a semi-infinite superlattice made out of superconductor-dielectric bilayers terminated cap layer. Both transverse electric magnetic are considered. These surface modes analogous to the so-called Tamm states electronic found at materials. The guided induced by layer strongly depend on whether ends superconductor or dielectric layer, thickness temperature as well polarization waves. Different kinds their...
Plasmonic coupling between adjacent metallic nanoparticles can be exploited for acousto-plasmonics, single-molecule sensing, and photochemistry. Light absorption or electron probes used to study plasmons their interactions, but use is challenging disordered systems colloids dispersed in insulating matrices. Here, we investigate the effect of plasmonic on optomechanics with Brillouin light spectroscopy (BLS) a prototypical metal-polymer nanocomposite, gold nanorods (Au NRs) polyvinyl alcohol....
Particle vibrational spectroscopy has emerged as a new tool for the measurement of elasticity, glass transition, and interactions at nanoscale. For colloid-based materials, however, weakly localized particle resonances in fluid or solid medium renders their detection difficult. The strong amplification inelastic light scattering near surface plasmon resonance metallic nanoparticles (NPs) allowed not only single NP eigenvibrations but also interparticle interaction effects on acoustic...
Abstract We study analytically and numerically the design of plasmonic demultiplexers based on Fano induced transparency (PIT) resonances. The consist T-shaped structures with an input waveguide two output waveguides. Each contains stubs grafted either at same position or different positions far from waveguide. derive closed form analytical expressions geometrical parameters allowing a selective transfer single mode in one without affecting other one. This is performed by implementing PIT...
Design and fabrication of three-dimensionally structured, gold membranes containing hexagonally close-packed microcavities with nanopores in the base, are described. Our aim is to create a nanoporous structure localized enhancement fluorescence or Raman scattering at, nanopore when excited light approximately 600 nm, view provide sensitive detection biomolecules. A range geometries integrated into assemblies micro-cavities was first evaluated theoretically. The optimal size shape single...
Plasmon-driven chemical transformation has become a promising approach for enhancing sluggish electrocatalytic reactions.
A Friedrich–Wintgen bound state in the continuum (FW-BIC) is of particular interest field wave physics phenomena. It induced via destructive interference two modes that belong to same cavity. In this work, we analytically and numerically show existence FW-BIC a T-shaped cavity composed stub length d0 lateral branches lengths d1 d2, attached an infinite waveguide. The whole system consists metal–insulator–metal (MIM) plasmonic waveguides operate telecommunication range. Theoretically, when d2...
We study numerically the interaction of surface acoustic waves propagating at a multilayer structure (the so-called Sezawa waves) with localized plasmons bottom metallic pillars deposited on substrate. The are made gold and is constituted by layer silicon substrate covered thin spacer dielectric material. interested in plasmons, which analog metal-dielectric-metal plasmons. physical characteristics these such as their eigenvalues absorption or reflection spectra, modulated due to deformation...
The interaction between phonons and localized plasmons in coupled nanoparticles can be exploited both for modulating the scattered electromagnetic field understanding of mechanical vibrations at nanoscale. In this paper, we demonstrate by numerical analysis an enhanced optomechanical a film-coupled gold dimer mediated surface acoustic waves. Two nanoridges are placed atop multilayer structure consisting thin dielectric spacer covering film layer on silicon dioxide substrate. Numerical...
We demonstrate, experimentally, nonvolatile optical control of terahertz metasurfaces composed a metallic split-ring resonator array sandwiched between monolayer graphene and photoconductive Fe:LiNbO3 substrate. demonstrate frequency-selective tuning THz transmission amplitude, our results pave the way toward spatially resolved THZ for beam steering, imaging, sensing applications. The substrate (Fe:LiNbO3) supports yet reversible photoinduced charge distributions, which locally modify...
We present a comprehensive study using finite element numerical analysis of the acoustic localized phonons supported by gold nanoridges dimer-based multilayer design. The latter consists in SiO2-substrate over which film covered with thin polymer is deposited. investigate first mechanical eigen-modes single monomer ridge, where we find flexural and compressional type modes sub-GHz frequency range. This realized either setting ridge periodic structure, enables to get dispersion curve modes,...
Graphene plasmonic devices have been demonstrated to show great potential for reconfigurable metasurfaces due the tuneable electronic charge transport properties of graphene in response electrostatic gating. Iron‐doped lithium niobate is proposed as a platform patterning‐free optically THz spectral region. Under structured illumination, undergoes migration bulk, where carriers migrate away from illuminated regions, forming spatially patterned distributions capable tuning graphene. These are...
The study of localized surface plasmons (LSPs) in nanoscale structures is an essential step towards identifying optimal plasmonic modes that can facilitate robust optomechanical coupling and deepen our understanding light-matter interactions at the nanoscale. This paper investigates numerically, using finite element method, LSPs a design comprising two coupled nano-ridges deposited on gold layer, with interposing polymer spacer layer. Such structure, usually referred to as...
The study of localized surface plasmons (LSPs) in nanoscale structures is an essential step towards identifying optimal plasmonic modes that can facilitate robust optomechanical coupling and deepen our understanding light–matter interactions at the nanoscale. This paper investigates, numerically, using finite element method, LSP a design comprising two coupled nano-ridges deposited on gold layer with interposing polymer spacer layer. Such structure, usually referred to as particle-on-mirror...
We report an experimental study of surface acoustic wave (SAW) localization and propagation in random metasurfaces composed Al scatters using pump–probe spectroscopy. Thanks to this technique, wideband high frequency modes are generated, their dynamical directly from inside the media with a (micrometric) spatial resolution is enabled. During SAW propagation, part wavefront energy trapped within free areas between scatterers, acting as cavities. The spectral content localized few GHz found...