期刊
COMPLEX LIGHT AND OPTICAL FORCES VI
卷 8274, 期 -, 页码 -出版社
SPIE-INT SOC OPTICAL ENGINEERING
DOI: 10.1117/12.913757
关键词
orbital angular momentum; polarization gratings; liquid crystal; complex beam; broadband
We introduce two high efficiency thin-film optical elements, operating over a wide spectral range, to generate and control the Orbital Angular Momentum (OAM) of various light sources: a broadband q-plate and a broadband Forked Polarization Grating (FPG). The broadband OAM manipulation is achieved by thin liquid crystal polymer layers that are aligned to provide the required spatially varying anisotropy. These elements operate using geometric phase principles to generate raised and lowered OAM modes whose efficiencies are sensitive to the polarization state of the incident light. We discuss the design principles involved and experimentally demonstrate broadband q-plates and FPGs that are highly efficient (> 90%) in the visible wavelength range. These thin film elements enable easy integration into various optical systems requiring broadband OAM manipulation such as optical trapping and high capacity information.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据