标题： 通过可调谐光学自旋-轨道耦合获取深亚波长物体的尺寸 显示英文标题

标题： Retrieving the Size of Deep-subwavelength Objects via Tunable Optical Spin-Orbit Coupling

摘要： 我们提出一种方案，以在远小于波长的尺度上检索玻璃基底上的纳米粒子的尺寸参数。 这是通过使用两个平面波照射粒子以产生丰富且非平凡的局部偏振分布，并观察散射到基底中的远场散射图案来实现的。 开发了一种简单的偶极子模型，利用倏逝场在临界角以外区域的隧穿效应，以及由于自旋-轨道耦合引起的定向散射，以将粒子的形状、尺寸和位置与远场散射相关联，具有显著的灵敏度。 我们的方法带来了基于矢量光与纳米粒子相互作用的远场超分辨率成像方案。 显示英文摘要

摘要： We propose a scheme to retrieve the size parameters of a nano-particle on a glass substrate at a scale much smaller than the wavelength. This is achieved by illuminating the particle using two plane waves to create rich and non-trivial local polarization distributions, and observing the far-field scattering pattern into the substrate. A simple dipole model which exploits tunneling effect of evanescent field into regions beyond the critical angle, as well as directional scattering due to spin-orbit coupling is developed, to relate the particle's shape, size and position to the far-field scattering with remarkable sensitivity. Our method brings about a far-field super-resolution imaging scheme based on the interaction of vectorial light with nanoparticles.