Modified Drude model for small gold nanoparticles surface plasmon resonance based on the role of classical confinement

  title={Modified Drude model for small gold nanoparticles surface plasmon resonance based on the role of classical confinement},
  author={Asef Kheirandish and Nasser Sepehri Javan and Hosein Mohammadzadeh},
  journal={Scientific Reports},
In this paper, we study the effect of restoration force caused by the limited size of a small metallic nanoparticle (MNP) on its linear response to the electric field of incident light. In a semi-classical phenomenological Drude-like model for small MNP, we consider restoration force caused by the displacement of conduction electrons with respect to the ionic positive background taking into account a free coefficient as a function of diameter of nanoparticle (NP) in the force term obtained by… 
Linear optical properties of a linear chain of interacting gold nanoparticles
In a Drude-like model for the conduction electrons of Metal Nanoparticles (MNPs) in a periodic linear chain, considering dipole-dipole interactions of adjacent particles, an analytical expression is
Analytical Approach to the Surface Plasmon Resonance Characteristic of Metal Nanoparticle Dimer in Dipole-Dipole Approximation
This theoretical study deals with the effect of bi-particle interaction on the surface plasmon resonance (SPR) in a dimer which includes two identical metal nanoparticles (NPs). Considering the
Noble classical and quantum approach to model the optical properties of metallic nanoparticles to enhance the sensitivity of optoplasmonic sensors
The bright light obtained from the quantum principle has a key role in the construction of optical sensors. Yet, theoretical and experimental work highlights the challenges of overcoming the high
Improved Drude-Lorentz dielectric function for gold nanospheres.
There is an ever-increasing body of research in applying the Localized Surface Plasmon Resonance (LSPR) of gold nanospheres for applications in the visual part of the electromagnetic spectrum. An
A Parabola-like Gold Nanobowtie on a Sapphire Substrate as a Nano-Cavity
Plasmonic, metallic nanostructures have attracted much interest for their ability to manipulate light on a subwavelength scale and for their related applications in various fields. In this work, a
Second harmonic generation from metal nanoparticle dimer: an analytical approach in dipole approximation
In this theoretical study, the problem of Second Harmonic Generation (SHG) in the interaction of laser beam with a Metallic Nanoparticle (MNP) dimer is considered. Using a classical electrodynamics
The role of optical loss and tight bounds in polariton-mediated near-field heat transfer
We introduce an analytical framework for near-field radiative heat transfer in bulk plasmonic and polar media. Considering material dispersion, we derive a closed form expression for the radiative
Exotic Coupling Between Plasmonic Nanoparticles Through Geometric Configurations
Coupled plasmonic systems are of great interest and have many applications such as information processing and sensing. By choosing proper geometric configurations of coupled plasmonic systems, one
Near-field radiation analysis and thermal contact radius determination in the thermal conductivity measurement based on SThM open-loop system
With the rapid development of materials science, plenty of materials with micro-nano structures are emerging in various fields due to their outstanding physical properties. In order to fulfill the


Size dependence of refractive index of gold nanoparticles
The extinction spectra of spherical gold nanoparticles suspended in a homogeneous media were measured and the results were adjusted with Mie’s theory together with an appropriate modification of the
Surface Plasmon Resonance in Small Gold Nanoparticles: Introducing a Size-Dependent Plasma Frequency for Nanoparticles in Quantum Regime
Study of surface plasmon resonance for small nanoparticles (R < 10 nm) has many theoretical complexities due to lack of a simple quantitative model for describing plasmonics in such quantum regime.
Chemical Interface Damping Depends on Electrons Reaching the Surface.
This study investigates the size dependence of CID by following the plasmon line width of gold nanorods during the adsorption process of thiols on the gold surface with single particle spectroscopy and shows that CID scales inversely with the effective path length of electrons, i.e., the average distance of electrons to the surface.
Ultrafast Electron Dynamics and Optical Nonlinearities in Metal Nanoparticles
The femtosecond optical response of noble metal nanoparticles and its connection to the ultrafast electron dynamics are discussed in light of the results of high-sensitivity femtosecond pump−probe
Width of cluster plasmon resonances: Bulk dielectric functions and chemical interface damping.
The damping of collective electron resonances in clusters which develop into plasmon polaritons at larger sizes is investigated for free, supported, and embedded neutral metal clusters and the results corroborate the assumption that the widths of the resonances strongly depend on chemical interface effects.
Size and temperature dependence of the plasmon absorption of colloidal gold nanoparticles
The size and temperature dependence of the plasmon absorption is studied for 9, 15, 22, 48, and 99 nm gold nanoparticles in aqueous solution. The plasmon bandwidth is found to follow the predicted
Dielectric coats effect on the third harmonic generation by a metallic nanoparticle lattice exposed to intense laser radiation
In this work, we theoretically study the effect of coating of metallic nanoparticles on the third harmonic generation in a periodic three-dimensional lattice. Taking into account the effects of
Mechanisms of Fano resonances in coupled plasmonic systems.
It is demonstrated theoretically and experimentally that Fano resonances can be obtained by destructive interference between two bright dipolar modes out of phase and a simple oscillator model is provided to predict and fit the far-field scattering.
Theoretical study of artificial Kerr effect on the self-focusing of laser in a dissipative suspension of silver nanoparticles
Self-focusing of laser beam propagating through a dissipative suspension of metallic nanoparticles is studied. The impact of the imaginary part of nanoparticle polarizability on the optical force and
Polarization effect on the nonlinear dynamics of linear chain of interactional metallic nanoparticles exposed on a laser beam: an analytical approach
The study of the dynamics of the interaction of intense electromagnetic fields with metallic nanoparticles is a great interest of some applied nonlinear phenomena in nano-optics and plasmonics. These