Magnetic dipole super-resonances and their impact on mechanical forces at optical frequencies
Fecha
2014Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1364/oe.22.008640
Resumen
Artificial magnetism enables various transformative optical
phenomena, including negative refraction, Fano resonances, and unconventional
nanoantennas, beamshapers, polarization transformers and perfect
absorbers, and enriches the collection of electromagnetic field control mechanisms
at optical frequencies. We demonstrate that it is possible to excite a
magnetic dipole super-resonance at optical ...
[++]
Artificial magnetism enables various transformative optical
phenomena, including negative refraction, Fano resonances, and unconventional
nanoantennas, beamshapers, polarization transformers and perfect
absorbers, and enriches the collection of electromagnetic field control mechanisms
at optical frequencies. We demonstrate that it is possible to excite a
magnetic dipole super-resonance at optical frequencies by coating a silicon
nanoparticle with a shell impregnated with active material. The resulting
response is several orders of magnitude stronger than that generated by bare
silicon nanoparticles and is comparable to electric dipole super-resonances
excited in spaser-based nanolasers. Furthermore, this configuration enables
an exceptional control over the optical forces exerted on the nanoparticle. It
expedites huge pushing or pulling actions, as well as a total suppression of
the force in both far-field and near-field scenarios. These effects empower
advanced paradigms in electromagnetic manipulation and microscopy. [--]
Materias
Magnetic dipole super-resonances,
Mechanical forces,
Optical frequencies
Editor
Optical Society of America
Publicado en
Optics Express, Vol. 22, Issue 7, pp. 8640-8653 (2014)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported in part by the Spanish Ministry of Science and Innovation, Projects
No. TEC2009-11995 and No. CSD2008-00066 and by the NSF Contract No. ECCS-1126572.