Belyaev Victor K, Rodionova Valeria V, Grunin Andrey A, Inoue Mitsuteru, Fedyanin Andrey A
Institute of Physics, Mathematics and Informational Technologies, Immanuel Kant Baltic Federal University, Kaliningrad, 236041, Russia.
Faculty of Physics, Lomonosov Moscow State University, Moscow, 119991, Russia.
Sci Rep. 2020 Apr 28;10(1):7133. doi: 10.1038/s41598-020-63535-1.
Here we report on designing a magnetic field sensor based on magnetoplasmonic crystal made of noble and ferromagnetic metals deposited on one-dimensional subwavelength grating. The experimental data demonstrate resonant transverse magneto-optical Kerr effect (TMOKE) at a narrow spectral region of 50 nm corresponding to the surface plasmon-polaritons excitation and maximum modulation of the reflected light intensity of 4.5% in a modulating magnetic field with the magnitude of 16 Oe. Dependences of TMOKE on external alternating current (AC) and direct current (DC) magnetic field demonstrate that it is a possibility to use the magnetoplasmonic crystal as a high-sensitive sensing probe. The achieved sensitivity to DC magnetic field is up to 10 Oe at local area of 1 mm.
在此，我们报告基于由沉积在一维亚波长光栅上的贵金属和铁磁金属制成的磁等离子体晶体设计磁场传感器的情况。实验数据表明，在对应于表面等离子体激元激发的50 nm窄光谱区域存在共振横向磁光克尔效应（TMOKE），并且在幅度为16 Oe的调制磁场中反射光强度的最大调制为4.5%。TMOKE对外部交流（AC）和直流（DC）磁场的依赖性表明，有可能将磁等离子体晶体用作高灵敏度传感探针。在1 mm的局部区域对直流磁场实现的灵敏度高达10 Oe。
