Fano resonances in plasmonic core-shell particles and the Purcell effect

Despite a long history, light scattering by particles with size comparable with the light wavelength still unveils surprising optical phenomena, and many of them are related to the Fano effect. Originally described in the context of atomic physics, the Fano resonance in light scattering arises from the interference between a narrow subradiant mode and a spectrally broad radiation line. Here, we present an overview of Fano resonances in coated spherical scatterers within the framework of the Lorenz-Mie theory. We briefly introduce the concept of conventional and unconventional Fano resonances in light scattering. These resonances are associated with the interference between electromagnetic modes excited in the particle with different or the same multipole moment, respectively. In addition, we investigate the modification of the spontaneous-emission rate of an optical emitter at the presence of a plasmonic nanoshell. This modification of decay rate due to electromagnetic environment is referred to as the Purcell effect. We analytically show that the Purcell factor related to a dipole emitter oriented orthogonal or tangential to the spherical surface can exhibit Fano or Lorentzian line shapes in the near field, respectively.Comment: 28 pages, 10 figures; invited book chapter to appear in "Fano Resonances in Optics and Microwaves: Physics and Application", Springer Series in Optical Sciences (2018), edited by E. O. Kamenetskii, A. Sadreev, and A. Miroshnichenk

Acceso abierto a la información científica y técnica en Empresa Brasileña de Investigación Agropecuária (Embrapa): relato de experiencia.

La Empresa Brasileña de Investigación Agropecuaria (Embrapa) desarrolla, desde 2009, "Acceso abierto en Embrapa: maximizar el impacto de la investigación, la visibilidad y la gestion de la información científica", que tiene como objetivo fomentar la transferencia de tecnologías producidas por la Empresa, así como el aumento de la visibilidad de la producción científica de sus investigadores y de la propia institución, al maximizar el acceso a la produción intelectual y la expansión de resultados de investigaciones realizadas. El proyecto es coordenado por Embrapa Información Tecnológica en colaboración con otros centros de investigación y ejecutado principamente por los bibliotecólogos que forman el Sistema de Bibliotecas de Embrapa. El objetivo de este trabajo es contribuir a las iniciativas de evaluación de sus repositorios institucionales: Repositorio de Acceso Abierto a la Información Científica (Alice) y al Servicio de Información Tecnológica en la Agricultura (Infoteca-e)

A manual for the removal, fixation and preservation of cetacean ears

This chapter is intended as an instructional guide for the removal, fixation and preservation of auditory system tissues of marine mammals. Each section describes procedures for a major ear type for marine mammals. The main intention is to provide both inexperienced and seasoned stranding responders with sufficient instructions to locate, document and remove all structures related to the ears and hearing in order to optimize the fixation and preservation of these tissues for later, more extensive examination. It is strongly recommended that examination be performed collaboratively with auditory system experts, but careful documentation and preservation are the critical first steps that will allow accurate diagnoses.Funding was provided by the Office of Naval Research under contract No. 13123100

Utilização de resíduos de carvão vegetal associado a fontes orgânicas de nutrientes no manejo sustentável do solo e do guaranazeiro (Paullinia cupana var. sorbilis (Mart.) Ducke) na Amazônia Central.

Neste capítulo serão apresentados resultados iniciais de um experimento de longo prazo cujo objetivo é conhecer a influência de resíduos de carvão vegetal, esterco de galinha e farinha de osso nas propriedades químicas e físicas do solo, bem como na sustentabilidade da cultura do guaranazeiro