Moncada-Villa Edwin, Mejía-Salazar J Ricardo
Escuela de Física, Universidad Pedagógica y Tecnológica de Colombia, Avenida Central del Norte 39-115, Tunja, Colombia.
National Institute of Telecommunications (Inatel), Santa Rita do Sapucaí, MG 37540-000, Brazil.
Sensors (Basel). 2020 Feb 11;20(4):952. doi: 10.3390/s20040952.
The ability of plasmonic structures to confine and enhance light at nanometer length scales has been traditionally exploited to boost the magneto-optical effects in magneto-plasmonic structures. These platforms allows for light control via externally applied magnetic fields, which is of prime importance for sensing, data storage, optical-isolation, and telecommunications applications. However, applications are hindered by the high-level of ohmic losses associated to metallic and ferromagnetic components. Here, we use a lossless all-dielectric platform for giant enhancement of the magneto-optical effects. Our structure consists of a high-refractive index dielectric film on top of a magnetic dielectric substrate. We numerically demonstrate an extraordinarily enhanced transverse magneto-optical Kerr effect due to the Fabry-Perot resonances supported by the high-refractive index slab. Potential applications for sensing and biosensing are also illustrated in this work.
传统上，等离子体结构在纳米长度尺度上限制和增强光的能力已被用于增强磁等离子体结构中的磁光效应。这些平台允许通过外部施加的磁场来控制光，这对于传感、数据存储、光隔离和电信应用至关重要。然而，与金属和铁磁部件相关的高欧姆损耗阻碍了这些应用。在此，我们使用无损全介质平台来极大地增强磁光效应。我们的结构由磁性介电衬底顶部的高折射率介电薄膜组成。我们通过数值证明，由于高折射率平板支持的法布里 - 珀罗共振，横向磁光克尔效应得到了极大增强。这项工作还展示了传感和生物传感的潜在应用。
