论文标题
贝塞尔束撞击的介电微球的空间狂热共振
Spatial Fano resonance of a dielectric microsphere impinged by a Bessel beam
论文作者
论文摘要
考虑到Fano共鸣的一般概念，以表明这种共鸣在太空中的可能性。使用最近发现的贝塞尔波梁撞击介电球的解决方案，我们分析了具有不同光学尺寸和介电值的微球附近的电磁场。从理论上讲，当球体的共振模式干扰{数量}非共振模式时，我们从理论上揭示了空间的FANO共振。这种共振导致一阶贝塞尔束撞击球后面的电场的巨大跳跃。事实证明，电磁场的局部最小值明显从微球的后边缘距离。但是，这是一个近场效应，我们证明了这一点。我们还表明，这种效果可用于工程具有具有异常和有用属性的亚微米陷阱。
General concept of Fano resonance is considered so that to show the possibility of this resonance in space. Using a recently found solution for a Bessel wave beam impinging a dielectric sphere, we analyze the electromagnetic fields near a microsphere with different optical size and permittivity values. We theoretically reveal a spatial Fano resonance when a resonant mode of the sphere interferes with {an amount of } non-resonant modes. This resonance results in a giant jump of the electric field behind the sphere impinged by the first-order Bessel beam. The local minimum of the electromagnetic field turns out to be noticeably distanced from the rear edge of the microsphere. However, this is a near-field effect and we prove it. We also show that this effect can be utilized for engineering a submicron optical trap with unusual and useful properties.
