论文标题
介电微球或小酰基在远场亚波长度成像中的正常极化的作用
Role of the normal polarization in the far-field subwavelength imaging by a dielectric microsphere or microcylinder
论文作者
论文摘要
讨论了正常极化在介电微球或微胶体中授予的远场亚波长度成像中的作用，并提出了解释这一实验事实的假设。这些假设之一通过精确的数值模拟证实。放大射击超级操作的这种机制基于正常偏振偶极子在弯曲的介电界面上激发蠕变波的激发。一组从表面射出后的爬行波会产生一个成像光束，该束可能会根据微粒半径模仿贝塞尔束或MATHIEU光束。该机制对应于不对称的相干照明。
Role of the normal polarization in the far-field subwavelength imaging granted by a dielectric microsphere or microcylinder is discussed and the hypotheses explaining this experimental fact are suggested. One of these hypotheses is confirmed by exact numerical simulations. This mechanism of the magnifying superlens operation is based on the excitation of creeping waves at a curved dielectric interface by a normally polarized dipole. The set of creeping waves after their ejection from the surface creates an imaging beam which may mimic either a Bessel beam or a Mathieu beam depending on the microparticle radius. This mechanism corresponds to the asymmetric coherent illumination.
