Portal de Periódicos da CAPES

Multifunctional geometric phase optical element for high-efficiency full Stokes imaging polarimetry

2019; Optica Publishing Group; Volume: 7; Issue: 9 Linguagem: Inglês

10.1364/prj.7.001066

2327-9125

Yanmeng Dai, Yuquan Zhang, Youpeng Xie, Dapeng Wang, Xianyou Wang, Ting Lei, Changjun Min, Xiaocong Yuan,

Optical Polarization and Ellipsometry

Polarization imaging finds applications in many areas, such as photoelasticity, ellipsometry, and biomedical imaging. A compact, snapshot, and high-efficiency imaging polarimeter is highly desirable for many applications. Here, based on a single multifunctional geometric phase optical element (GPOE), a new method is proposed for high-efficiency snapshot imaging polarimetry. With tailored spatially varying orientation of each anisotropic unit cell, the GPOE works highly efficiently as both a spin sorter and a half-wave plate, enabling snapshot retrieving of a full Stokes vector of incident light. The designed GPOE is implemented in the form of liquid crystal fabricated with a photo-alignment technology, and its application in imaging polarimetry is experimentally demonstrated by retrieving full Stokes parameters of a cylinder vector beam. This method can also work in the form of plasmonic or dielectric metasurfaces, enabling ultra-compact polarization detection systems by monolithic integration with other devices such as metalenses.