Magneto-optical imaging setup for single vortex observation
Magneto-optical imaging setup for single vortex observation
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DOI：
10.1063/1.1525875
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发表时间：
2003-01-01
影响因子：
1.6
通讯作者：
Johansen, TH
中科院分区：
文献类型：
--
作者：
Goa, PE;Hauglin, H;Johansen, TH
介绍了一种新研制的高分辨率磁光成像装置。这是第一个能够分辨II型超导体中单个涡旋的MOI系统。我们给出了一个详细的描述，整个设置，并讨论其测量性能的磁灵敏度和信号噪声特性。建立了涡旋晶格引起的图像强度分布的简单模型，对于单个涡旋的强度分布，我们发现模型计算与实验数据之间具有良好的一致性。最小涡间距解决实验是1.3妈妈。我们的分析表明，提高分辨率可以最容易地通过增加光输入强度来实现，但最大分辨率最终受到光学系统的有效消光比和设置中的机械振动的限制。(C)2003年，美国物理学会。
A recently developed high-resolution magneto-optical imaging (MOI) setup is reviewed. It is the first MOI system capable of resolving the individual vortices in a type-II superconductor. We give a detailed description of the whole setup, and discuss its measured properties in terms of magnetic sensitivity and signal-noise characteristics. A simple model for the image intensity distribution due to a vortex lattice is developed, and for the intensity profile across a single vortex, we find good agreement between model calculations and experimental data. The minimum vortex spacing resolved experimentally is 1.3 mum. Our analysis shows that increased resolution can most easily be achieved by increasing the light input intensity, but maximum resolution is ultimately limited by the effective extinction ratio through the optical system and mechanical vibrations in the setup. (C) 2003 American Institute of Physics.