物理学报Issue(17)：1-6,6.DOI:10.7498/aps.64.174202
磁光克尔效应中的光子自旋分裂∗
Photon spin splitting in magneto-optic Kerr effect
摘要
Abstract
Photonic spin Hall effect (PSHE) of light, similar to the spin Hall effect of an electronic system, is the interaction between photon spin-orbit of spin splitting phenomenon in refractive index gradient field. PSHE provides a new way to manipulate photons and accurately measure relevant physical effects. This paper studies the photon spin splitting in the magneto-optic Kerr effect, and establishes the quantitative relationship between the magneto-optical Kerr rotation and the PSHE. We have observed the magneto-optic Kerr effect of the action of an iron film in the magnetic field. After finishing experiments, we firstly analyze the amplified shift of the spin changing with the magnetic intensity in the case of horizontal polarization and vertical polarization incidence. Then, the Kerr rotations changing with the incident angle for different magnetizations are measured separately. Finally, comparing the above two results, we obtain that the accurate magneto-optic Kerr rotation angle is 6:7 10 5◦/m. If the position sensor based on phase-locked amplifier (20 nm) is used to measure the magneto-optic Kerr rotation angle, its precision can be improved by one or two orders of magnitude. These results prove that the PSHE not only can be used to accurately measure the magneto-optic Kerr effect, but also have great significance in magnetic film research. Especially, in terms of magnetic-optic devices, PSHE can be used to achieve the superior performance of endurance cycling and data retention关键词
光子自旋霍尔效应/磁光系数/弱测量系统/磁光克尔效应Key words
spin Hall effect of light/magneto-optical coefficient/weak measurement system/magneto-optical Kerr effect引用本文复制引用
..磁光克尔效应中的光子自旋分裂∗[J].物理学报,2015,(17):1-6,6.基金项目
国家自然科学基金(批准号:11305111,61377054)和合作创新基金(批准号：XTCX2013002)资助的课题.* Project supported by the National Natural Science Foundation of China (Grants Nos.11305111,61377054), and the Foundation of Collaborative Innovation (Grant No. XTCX2013002) （批准号:11305111,61377054）
