Subdiffraction focusing enabled by a Fano resonance

S Chen, S Jin, R Gordon - Physical Review X, 2014 - APS
Radiationless electromagnetic interference (REI) has been used to achieve focusing below
Abbe's diffraction limit. Here, we demonstrate an approach to REI that uses the Fano …

Electromagnetic energy in multilayered spherical particles

IL Rasskazov, A Moroz, PS Carney - arXiv preprint arXiv:1905.02057, 2019 - arxiv.org
We obtain exact analytic expressions for (i) the electromagnetic energy radial density within
and outside a multilayered sphere and (ii) the total electromagnetic energy stored within its …

Fano resonances and fluorescence enhancement of a dipole emitter near a plasmonic nanoshell

TJ Arruda, R Bachelard, J Weiner, S Slama… - Physical Review A, 2017 - APS
We analytically study the spontaneous emission of a single optical dipole emitter in the
vicinity of a plasmonic nanoshell, based on the Lorenz-Mie theory. We show that the …

Fano resonance in a gold nanosphere with a J-aggregate coating

AM Fales, SJ Norton, BM Crawford… - Physical Chemistry …, 2015 - pubs.rsc.org
We present a facile method to induce J-aggregate formation on gold nanospheres in
colloidal solution using polyvinylsulfate. The nanoparticle J-aggregate complex results in an …

Fano resonance in high-permittivity dielectric spheres

X Kong, G Xiao - JOSA A, 2016 - opg.optica.org
In this paper, an approximate model is presented to understand Fano resonance observed
in the Mie scattering from a homogeneous dielectric sphere. By using the model, we can …

Electromagnetic energy and negative asymmetry parameters in coated magneto-optical cylinders: Applications to tunable light transport in disordered systems

TJ Arruda, AS Martinez, FA Pinheiro - Physical Review A, 2016 - APS
We investigate electromagnetic scattering of normally irradiated gyrotropic, magneto-optical
core-shell cylinders using Lorenz-Mie theory. A general expression for time-averaged …

Tunable multiple Fano resonances in magnetic single-layered core-shell particles

TJ Arruda, AS Martinez, FA Pinheiro - Physical Review A, 2015 - APS
We investigate multiple Fano, comblike scattering resonances in single-layered, concentric
core-shell nanoparticles composed of magnetic materials. Using the Lorenz-Mie theory, we …

Tunablity of the unconventional Fano resonances in coated nanowires with radial anisotropy

HL Chen, L Gao - Optics Express, 2013 - opg.optica.org
We establish full-wave electromagnetic scattering theory to study the near-field and far-field
spectra of radially anisotropic coated nanowires. For coated nanowires containing radially …

Enhancing the plasmonic fields by a high refractive index dielectric coating for surface enhanced spectroscopies

L Deng, Y Zhai, Y Chen, N Wang… - Journal of Physics D …, 2019 - iopscience.iop.org
For stabilization and functionalization, plasmonic nanoparticles (NPs) are often coated with
dielectric shells, yet suffer from the weakening of local electric field enhancement. Herein …

Electric and magnetic toroidal dipole excitations in core-shell spheres

TJ Arruda - Physical Review B, 2024 - APS
Toroidal dipole moments, which consist of enclosed circulating currents aligned along paths
within a torus shape, can be experimentally achieved in metamaterials using various …