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作者机构:Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices South China Normal University Guangzhou China Centre for Micro-Photonics Faculty of Science Engineering and Technology Swinburne University of Technology HawthornVIC Australia Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications Specially Functional Fiber Engineering Technology Research South China Normal University Guangzhou China Key Laboratory of Quantum Information University of Science and Technology of China Chinese Academy of Sciences Hefei China South China Academy of Advanced Optoelectronics South China Normal University Guangzhou China
出 版 物:《IEEE Photonics Journal》 (IEEE Photon. J.)
年 卷 期:2016年第8卷第5期
页 面:1-9页
核心收录:
学科分类:0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术(可授工学、理学学位)] 08[工学] 081402[工学-结构工程] 0803[工学-光学工程] 0814[工学-土木工程] 0702[理学-物理学] 0812[工学-计算机科学与技术(可授工学、理学学位)]
主 题:Circular polarization
摘 要:The ability to manipulate polarization of light on a chip is of fundamental importance for many applications. Here, we demonstrate an ultrabroadband quarter-wave plate for silicon photonics based on pure dielectric waveguides. The concept of birefringence is used to introduce a phase lag of π/2 between two orthogonally polarized modes in nanophotonic waveguides, such that a quasi-linearly polarized mode is converted into a quasi-circularly polarized mode, which is accompanied with a longitudinal optical vortex component due to the spin-orbit interaction. Our device is ultracompact (2.3 μm) with low insertion losses (around 0.05 dB), and it allows for an ultrabroad operation bandwidth of 280 nm around 1.55 μm. We also propose a half-wave plate structure, which can either serve as a chiral converter for quasi-circularly polarized modes or a polarization rotator for quasi-linearly polarized modes. These results may find important applications in many fields, such as integrated quantum computing and polarization handling on a chip. © 2016 IEEE.