High-contrast imaging of magnetic domains by magneto-optical Kerr effect using plasmon filters
High-contrast imaging of magnetic domains by magneto-optical Kerr effect using plasmon filters
复制标题
使用等离激元滤波器通过磁光克尔效应对磁域进行高对比度成像
DOI：
10.1117/12.2507216
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Kimihiro Ozaki
中科院分区：
文献类型：
--
作者：
Takumi Hasegawa;Mizue Mizoshiri;Kenta Takagi;Kimihiro Ozaki
利用等离激元滤波器增强的磁光克尔效应进行磁域的高对比度成像。等离激元滤波器是通过对沉积在 SiO2 基板上的金薄膜进行退火来制备的。 Au纳米颗粒是通过使Au薄膜变形而形成的。该滤光片在 570 nm 左右的波长处表现出强烈的吸收峰。使用磁光克尔效应显微镜将滤光片设置在磁体表面上获得图像。通过比较变异系数（CV）来评估图像对比度，变异系数表现出观察到的图像的亮度直方图中数据的变化。随着CV值增大，表示磁畴图像的亮度值的范围增大。使用等离激元滤波器的观察图像的CV值比仅基板大，表明观察图像的对比度得到改善。使用等离激元滤波器获得磁域的高对比度图像。
High-contrast imaging of magnetic domains were performed using magneto-optical Kerr effect enhanced by the plasmon filter. The plasmon filter was prepared by annealing Au thin films deposited on a SiO2substrate. Au nanoparticles were formed by deforming the Au thin film. The filter exhibited an intense absorption peak at wavelength around 570 nm. The images were obtained setting the filter onto a magnet surface using a magneto-optical Kerr effect microscopy. The image contrast was evaluated by comparing Coefficient of Variations (CV) which exhibited the variation of the data in luminance histograms of the observed images. As the value of CV increases, the range of the luminance value expressing the image of magnetic domains is increased. The value of CV of the observation image with the plasmon filter was larger than only substrate, indicating that the contrast of the observation image was improved. High-contrast image of magnetic domains was obtained using the plasmon filter.