Nanostructures with combined magnetic and plasmonic properties have become an active subject of research in recent years. However, most of magneto-plasmonic systems as biosensors adopt a complex intertwined configuration or operate in the monochrome excitation. In this work, we present a simple magneto-plasmonic system which consists of an Au nanowire array on top of a cobalt film, and theoretically demonstrate an enhanced transverse magneto-optical Kerr effect (TMOKE) of the system under the excitation of broadband light source. We study the tunable mechanism of the structure and also expound the correlation of the magnitude of the magneto-optical effect and the contrast ratio of reflection spectra, demonstrating that the high spectral contrast ratio is favorable for obtaining a giant TMOKE value with a sharp Fano-like resonance. In addition, the electromagnetic fields are strongly enhanced in the system due to the introduction of the Co layer, giving rise to high bulk sensitiv...

中文翻译：

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磁电等离子体晶体中的可调磁光响应，用于折射率传感

近年来，具有磁和等离子体性能的纳米结构已成为研究的活跃课题。然而，大多数作为生物传感器的磁等离子体系统采用复杂的缠绕结构或在单色激发下运行。在这项工作中，我们提出了一个简单的磁电等离子体系统，该系统由钴膜顶部的金纳米线阵列组成，并且在理论上证明了宽带光源激发下该系统的增强的横向磁光克尔效应（TMOKE） 。我们研究了结构的可调机理，并阐明了磁光效应的大小与反射光谱的对比度的相关性，证明了高光谱对比度有利于获得具有锐利Fano-喜欢共鸣。此外，