标题： 红外光通过介电核壳粒子的散射 显示英文标题

标题： Scattering of infrared light by dielectric core-shell particles

摘要： 我们研究红外光与小的介电核壳粒子的散射，以含有CaO核心的蓝宝石球为例。 这种粒子的消光效率显示出两组强烈的共振，分别与核心-壳层和壳层-真空界面处相位一致和相位不一致的多极极化引起的表面电荷积累有关。 这两组共振，前者可标记为成键特性，后者为反成键特性，导致异常散射。 对于给定的粒子半径和填充因子，坡印廷矢量场因此在两个波数周围表现出此类光散射的复杂拓扑结构。 在粒子内部，拓扑结构取决于共振的特性。 粒子内部的能量耗散也反映了核壳结构。 它取决于共振，并表现出强烈的空间变化。 显示英文摘要

摘要： We study the scattering of infrared light by small dielectric core-shell particles taking a sapphire sphere with a CaO core as an example. The extinction efficiency of such a particle shows two intense series of resonances attached, respectively, to in-phase and out-of-phase multipolar polarization-induced surface charges build-up, respectively, at the core-shell and the shell-vacuum interface. Both series, the character of the former may be labelled bonding and the character of the latter antibonding, give rise to anomalous scattering. For a given particle radius and filling factor the Poynting vector field shows therefore around two wave numbers the complex topology of this type of light scattering. Inside the particle the topology depends on the character of the resonance. The dissipation of energy inside the particle also reflects the core-shell structure. It depends on the resonance and shows strong spatial variations.