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

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

Lobotomia pré-frontal. Resultados clínicos em hospital privado

Escola Paulista de Medicina Instituto Paulista Serviço de PsiquiatriaHospital de JuqueriSecção de Higiene Mental Escolar Serviço de Neuro-Psiquiatria do Instituto PaulistaUNIFESP, EPM, Instituto Paulista Serviço de PsiquiatriaSciEL

Starting at the endophenotype: A role for alpha-CaMKII in schizophrenia?

Using an endophenotype-driven screen, a new study finds that α-calcium/calmodulin kinase II mutant mice exhibit a range of behavioral abnormalities related to schizophrenia. Perhaps most strikingly, this cluster of schizophrenia-related endophenotypes was associated with abnormal neurogenesis in the adult hippocampus, raising the possibility that disrupted adult neurogenesis lies at the core of this and other psychiatric disorders

Photofission and Quasi-Deuteron-Nuclear State as Mixing of Bosons and Fermions

The empirical-phenomenological quasi-deuteron photofission description is theoretically justified within the semiclassical, intermediate statistics model. The transmutational fermion (nucleon) - boson (quasi-deuteron) potential plays an essential role in the present context and is expressed in terms of thermodynamical and of microscopical quantities, analogous to those commonly used in the superfluid nuclear model.Comment: 7 pages, RevTex, to appear in Zeit. f. Phys.

Charcoal (Biochar) as soil conditioner to enhance fertilizers and water use efficiency in agriculture in acid tropical soils in the Central Amazon Basin

This article summarize result of many experiments conducted in 15 years of research with biochar in nursery and field experiments in the Central Amazon