Creation of isotropic super-resolved magnetization with steerable orientation
Creation of isotropic super-resolved magnetization with steerable orientation
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DOI：
10.1063/1.5042571
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发表时间：
2018-09
期刊：
影响因子：
5.6
通讯作者：
Weichao Yan;Zhongquan Nie;Xiaofei Liu;Xueru Zhang;Yu-xiao Wang;Yinglin Song
中科院分区：
文献类型：
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作者：
Weichao Yan;Zhongquan Nie;Xiaofei Liu;Xueru Zhang;Yu-xiao Wang;Yinglin Song
在这项工作中，我们提出了一种可行的途径，可以初步构建光致各向同性超分辨磁化以及可操纵的取向和琐碎的旁瓣水平。为此，将反向传播的方位角极化涡旋厄米高斯光束在出口瞳孔平面上安装角旋转器，然后使用4π光学显微镜配置的高数值孔径物镜进行聚焦。通过任意调节可旋转方位角和合理优化缩放参数，可以产生球形超分辨（λ3/24）、取向可调（任意方向）和副瓣可忽略（<20%）的磁化斑。这种明确的磁化行为不仅归因于传入矢量场的轴对称破坏，而且归因于所有磁化分量在各个方向上引起的建设性干涉。所证明的结果在开发新型磁光和自旋光子器件方面具有很大的潜力。在这项工作中，我们提出了一种可行的途径，可以初步构建光致各向同性超分辨磁化以及可操纵的取向和琐碎的旁瓣水平。为此，将反向传播的方位角极化涡旋厄米高斯光束在出口瞳孔平面上安装角旋转器，然后使用4π光学显微镜配置的高数值孔径物镜进行聚焦。通过任意调节可旋转方位角和合理优化缩放参数，可以产生球形超分辨（λ3/24）、取向可调（任意方向）和副瓣可忽略（<20%）的磁化斑。这种明确的磁化行为不仅归因于传入矢量场的轴对称破坏，而且归因于所有磁化分量在各个方向上引起的建设性干涉。所证明的结果在开发新型磁光材料方面具有很大的潜力。
In this work, we present a feasible pathway for initially constructing light-induced isotropic super-resolved magnetization along with steerable orientations and trivial side-lobe levels. Toward this end, the counter-propagating azimuthally polarized vortex Hermite–Gauss beams are tailored with angular rotators at the exit pupil planes and then focused by using high numerical aperture objective lenses in a 4π optical microscopic configuration. By wilfully regulating the rotatable azimuth angle and judiciously optimizing the scaling parameter, the spherical super-resolved (λ3/24), orientation-tunable (any direction), and sidelobe-negligible (<20%) magnetization spot can thus be produced. Such well-defined magnetization behavior is attributed to not merely the axially symmetrical destruction of the incoming vectorial fields but also the constructive interference in all directions caused by all the magnetization components. The demonstrated outcomes hold great potential in developing novel magneto-optical and spin-photonic devices.In this work, we present a feasible pathway for initially constructing light-induced isotropic super-resolved magnetization along with steerable orientations and trivial side-lobe levels. Toward this end, the counter-propagating azimuthally polarized vortex Hermite–Gauss beams are tailored with angular rotators at the exit pupil planes and then focused by using high numerical aperture objective lenses in a 4π optical microscopic configuration. By wilfully regulating the rotatable azimuth angle and judiciously optimizing the scaling parameter, the spherical super-resolved (λ3/24), orientation-tunable (any direction), and sidelobe-negligible (<20%) magnetization spot can thus be produced. Such well-defined magnetization behavior is attributed to not merely the axially symmetrical destruction of the incoming vectorial fields but also the constructive interference in all directions caused by all the magnetization components. The demonstrated outcomes hold great potential in developing novel magneto-optical an...