Polarization of light is a fundamental characteristic which represents the oscillation of electric fields in electromagnetic optics. The utilization of polarization gives opportunities to analyze the light-matter interaction or improve the performance of optical devices. Miniaturization of polarimeter consisting of bulky optical components is an important challenge for applying to integrated photonic chips or sensors. In this letter, we propose a compact plasmonic polarimeter with six different plasmonic lenses for detecting Stokes parameters in near field. Each plasmonic lens, which focuses plasmonic fields under the specific polarization incidence, can be designed by pairs of nanoslit with different configurations. We theoretically and numerically show that the intensities of plasmonic focal spots can derive full Stokes parameter. We expect that the proposed work can contribute to miniaturization and integration of polarimeter.

光的偏振是基本特征，代表电磁光学器件中电场的振荡。偏振的利用为分析光与物质的相互作用或改善光学器件的性能提供了机会。由庞大的光学组件组成的旋光仪的小型化是应用于集成光子芯片或传感器的重要挑战。在这封信中，我们提出了一种紧凑的等离子旋光仪，它带有六个不同的等离子透镜，用于在近场中检测斯托克斯参数。每个等离子透镜，在特定的偏振入射下聚焦等离子场，可以通过成对的具有不同配置的纳米狭缝来设计。我们在理论上和数值上表明，等离子体焦点的强度可以导出完整的斯托克斯参数。