Full-wave electromagnetic modes and hybridization in nanoparticle dimers

Pascale, Mariano; Miano, G.; Tricarico, Roberto; Forestiere, Carlo

doi:10.1038/s41598-019-50498-1

Cited by 28 publications

(22 citation statements)

References 73 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Formally, this is described as a contribution by higher-order multipoles of the monomer. 36 Although the mixing affects the eigenvectors, the selection rules remain strictly applicable, since the mode symmetry has to be identical. For typical nanooligomers, the calculated eigenmodes remain predominantly dipole-like, quadrupole-like and so forth.…”

Section: (A) the Non-degeneratementioning

confidence: 99%

Selection Rules for Structured Light in Nanooligomers and Other Nanosystems

2020

View full text Add to dashboard Cite

Structured light are custom light fields where the phase, polarization, and intensity vary with position. It has been used for nanotweezers, nanoscale imaging, and quantum information technology, but its role in exciting optical transitions in materials has been little examined so far. Here we use group theory to derive the optical selection rules for nanosystems that get excited by structured light. If the size of the nanostructure is comparable to the light wavelength, it will sample the full beam profile during excitation with profound consequences on optical excitations. Using nanooligomers as model nanosystems, we show that structured light excites optical transitions that are forbidden for linearly polarized or unpolarized light. Such dipole forbidden modes have longer lifetimes and narrower resonances than dipole allowed transitions. We derive symmetry-adapted eigenmodes for nanooligomers containing up to six monomers. Our study includes tables with selection rules for cylindrical vector beams, for beams with orbital angular momentum, and for field retardation along the propagation direction. We discuss multi-photon processes of nonlinear optics in addition to one-photon absorption. Structured light will unlock a broad range of excitations in nanooligomers and other nanostructures that are currently inaccessible to optical studies.

show abstract

Section: (A) the Non-degeneratementioning

confidence: 99%

Selection Rules for Structured Light in Nanooligomers and Other Nanosystems

2020

View full text Add to dashboard Cite

show abstract

“…[ 183 ] In higher‐order multipole modes, a modified hybridization theory must be introduced to describe their complex interactions. [ 197 ] This modified hybridization theory, based on Maxwell's equations for non‐Hermitian composite systems, overcomes the limitation by considering the following three factors: magnetic interaction, retardation effect, and radiation loss. These factors dictate dielectric scattering, mode coupling with the incident radiation, radiative strength determination, and scattering resonance broadening.…”

Section: Manipulation Of the Scattering Characteristicsmentioning

confidence: 99%

Resonant Scattering Manipulation of Dielectric Nanoparticles

Zhang

et al. 2021

Advanced Optical Materials

View full text Add to dashboard Cite

The concentration and manipulation of light in the nanoscale range are fundamental to nanophotonic research. Plasmonic nanoparticles can localize electromagnetic waves within subdiffraction volumes, but they also undergo large Joule losses and inevitable thermal heating. Subwavelength dielectric nanoparticles have emerged as a new class of photonic building blocks that enhance light–matter interactions within nanometric volumes. These nanoparticles exhibit strong electric and magnetic responses with negligible energy dissipation. In recent decades, the design of efficient dielectric nanoresonators has seen tremendous progress. In this review, recent theoretical and experimental advances in characterizing the optical properties of dielectric nanoparticles, from resonant single‐particle scattering characteristics to multimodal interference in complex particle assemblies, are discussed. Specific attention is paid to novel strategies employed to manipulate far‐field Mie‐type scattering, enhance local electromagnetic field, and boost magnetic resonance, as well as ultimately achieve Fano‐like resonance, unidirectional scattering (Kerker conditions), and photon waveguide. A collection of emerging applications of dielectric nanoparticles is also highlighted and the fundamental prospects of designing all‐dielectric/metallic–dielectric photonic nanostructures are considered, particularly those of functional dielectric materials and all‐dielectric 3D assemblies.

show abstract

“…To obtain the result, we required the definition of V νµ in ( 29) and the eigenvalue equation (30). Finally, we have inserted the symmeterized coefficients b µ,m defined in (31) and assumed that ∑ µ b 2 µ,m = 1, since this is precisely the dot product between the normalized left and right eigenvectors of the symmeterized matrix operator in (31), which is enforced by some, though not all, linear algebra packages.…”

Section: Normalization and Orthogonalitymentioning

confidence: 99%

“…The method was successfully applied to a series of simple cases, 23 including 1D slabs, 27 2D wires, 24,28 and spheres, [29][30][31] where the modes could be found easily and quickly via a transcendental equation, for which we built a reliable root search algorithm. 32 For modes of a general geometry we adapted the eigenfrequency solvers of COMSOL, a FEM-based software package, to produce eigenpermittivity modes.…”

Section: Introductionmentioning

confidence: 99%

An efficient solver for the generalized normal modes of non-uniform open optical resonators

Chen

Sivan

Muljarov

2020

Journal of Computational Physics

View full text Add to dashboard Cite

Modal expansion is an attractive technique for solving electromagnetic scattering problems. With the one set of resonator modes, calculated once and for all, any configuration of near-field or far-field sources can be obtained almost instantaneously. Traditionally applied to closed systems, a simple and rigorous generalization of modal expansion to open systems using eigenpermittivity states is also available. These open modes are suitable for typical nanophotonic systems, for example. However, the numerical generation of modes is usually the most difficult and timeconsuming step of modal expansion techniques. Here, we demonstrate efficient and reliable mode generation, expanding the target modes into the modes of a simpler open system that are known. Such a re-expansion technique is implemented for resonators with non-uniform permittivity profiles, demonstrating its rapid convergence. Key to the method's success is the inclusion of a set of longitudinal basis modes.

show abstract

Full-wave electromagnetic modes and hybridization in nanoparticle dimers

Cited by 28 publications

References 73 publications

Selection Rules for Structured Light in Nanooligomers and Other Nanosystems

Selection Rules for Structured Light in Nanooligomers and Other Nanosystems

Resonant Scattering Manipulation of Dielectric Nanoparticles

An efficient solver for the generalized normal modes of non-uniform open optical resonators

Contact Info

Product

Resources

About