6533b872fe1ef96bd12d4279
RESEARCH PRODUCT
Optical absorption of torus-shaped metal nanoparticles in the visible range
Alexandre BouhelierDaniel KollerAlexandre MaryJoachim R. KrennAndreas HohenauAlain Dereuxsubject
SURFACE PLASMONMaterials science02 engineering and technology01 natural sciencesMolecular physicsResonance (particle physics)Optics[ PHYS.COND.CM-MSQHE ] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]0103 physical sciences[SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics010306 general physicsAbsorption (electromagnetic radiation)Spectroscopy[PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]TORUS[PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics]SPECTROSCOPY[ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics]Extinction crossbusiness.industrySurface plasmonTorus021001 nanoscience & nanotechnologyCondensed Matter PhysicsElectronic Optical and Magnetic MaterialsQuasiparticleVisible range[ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics0210 nano-technologybusinessdescription
Received 22 November 2007; published 19 December 2007We theoretically and experimentally investigated the optical response of a thin metal nanotorus in the visiblerange. The close formulas describing the extinction cross sections of a torus are obtained in the nonretardedapproximation. We demonstrate a good agreement between numerical simulations and experimental data. Ourfindings show that the main resonance is highly sensitive to the external medium and the geometrical param-eters of the particle.DOI: 10.1103/PhysRevB.76.245422 PACS number s : 78.67.Bf, 73.20.Mf, 78.20.Ci
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2007-12-19 |