Abstract
In this Letter, all-optical generation of magnetization with arbitrary three-dimensional (3D) orientations is numerically demonstrated through the inverse Faraday effect (IFE) by using a reversing calculation method. The IFE-induced magnetization with an expected 3D orientation is initially conceived by coherently configuring two orthogonally arranged electric dipoles with a phase difference of in the focal region of a to-be-determined incident light field. Based on the dipole antenna theory, this required incident light field can be deduced analytically according to the orientations of the electric dipoles. By utilizing this field as illumination and reversing the field propagation, magnetization with the expected orientation can be obtained in the focal region through the IFE. Moreover, this method showcases a high magnetization orientation purity (greater than 93%) within the focal volume defined by the full width at half maximum when the numerical aperture of the focal lens is 0.95. This result demonstrates extended flexibility of magnetization manipulations in an all-optical fashion and possesses great potential in spintronics and all-optical magnetic recording.
© 2018 Optical Society of America
Full Article | PDF ArticleMore Like This
Jianjun Luo, Henwen Zhang, Sicong Wang, Liu Shi, Zhuqing Zhu, Bing Gu, Xiaolei Wang, and Xiangping Li
Opt. Lett. 44(4) 727-730 (2019)
Sicong Wang, Yaoyu Cao, and Xiangping Li
Opt. Lett. 42(23) 5050-5053 (2017)
Weichao Yan, Shirong Lin, Han Lin, Yun Shen, Zhongquan Nie, Baohua Jia, and Xiaohua Deng
Opt. Express 29(2) 961-973 (2021)