Plasmon spectra of nanospheres under a tightly focused beam

Abstract

We study the modification of the far-field cross sections and the near-field enhancement for gold and silver nanospheres illuminated by a tightly focused beam. Using a multipole-expansion approach we obtain an analytical solution to the scattering problem and provide insight on the effects of focusing on the optical response. Large differences with respect to Mie theory are found especially when the nanoparticle supports quadrupole or higher-order resonances.

arXiv comment19 pages, 7 figures

References in corpus (3)

• On-command enhancement of single molecule fluorescence using a gold nanoparticle as an optical nano-antenna
• Photothermal heterodyne imaging of individual nonfluorescent nanoclusters and nanocrystals
• Optical microscopy via spectral modifications of a nano-antenna

Cited by in corpus (20)

• Nanointerferometric Amplitude and Phase Reconstruction of Tightly Focused Vector Beams
• Perfect Reflection of Light by an Oscillating Dipole
• Perfect coupling of light to surface plasmons by coherent absorption
• Transverse Kerker Scattering for Angstrom Localization of Nanoparticles
• Optical antennas as nanoscale resonators
• Coherent Interaction of Light and Single Molecules in a Dielectric Nanoguide
• Interfacing light and single atoms with a lens
• Excitation of single multipolar modes with engineered cylindrically symmetric fields
• Accurate feeding of nano antenna by polarization singularities for lateral and rotational displacement sensing
• Dual and anti-dual modes in dielectric spheres
• The role of the angular momentum of light in Mie scattering. Excitation of dielectric spheres with Laguerre-Gaussian modes
• Tailoring the excitation of localized surface plasmon-polariton resonances by focusing radially-polarized beams
• Large suppression of quantum fluctuations of light from a single emitter by an optical nanostructure
• Vector spherical quasi-Gaussian vortex beams
• Hybrid Metal-Dielectric Plasmonic Zero Mode Waveguide for Enhanced Single Molecule Detection
• Metal nanoparticles in strongly confined beams: transmission, reflection and absorption
• Sectoral Multipole Focused Beams
• Detection of Hybrid Optical Anapoles in Dielectric Microspheres
• Size-Selective Optical Printing of Silicon Nanoparticles through Their Dipolar Magnetic Resonance
• High-cooperativity nanofiber laser