Origin of magnetic effect of surface plasmon and its application for ultra-fast magnetic sensor in nano-scale

为了开发一种基于表面等离子体现象的新型磁传感器，我们研究了1)澄清表面等离子体磁响应的来源，2)实现表面等离子体的良好磁响应，3)建立表面等离子体波导技术。Ag-Co单层膜具有Co粒子分散在Ag基体中的结构，其表面等离子体激元的磁响应值较高。Ag-Co单膜中既有表面等离子体产生材料Ag，又有铁磁性材料Co，因此其表面等离子体产生条件容易由膜厚控制。

For development of a new magnetic sensor based on surface plasmon phenomenon, we studied 1) clarifying an origin of magnetic response of surface plasmon, 2) achieving good response of surface plasmon magnetically, and 3) establishing a surface plasmon waveguide technique. Higher value about magnetic response of surface plasmon was obtained using a Ag-Co single layer film, which had a structure that Co particles were dispersed in Ag matrix. A generation condition of surface plasmon in Ag-Co film was easy to be controlled by its film thickness, because the Ag-Co single film contained both surface plasmon generation material, Ag, and ferromagnetic material, Co, in single layer.