The Faraday effect describes the phenomenon that a magnetized material can alter the polarization state of transmitted light. Interestingly, unlike most light-matter interactions in nature, it breaks Lorentz reciprocity. This exceptional behavior is utilized for applications such as optical isolators, which are core elements in communication and laser systems. While there is high demand for sub-micron nonreciprocal photonic devices, the realization of such systems is extremely challenging as conventional magneto-optic materials only provide weak magneto-optic response within small volumes. Plasmonics could be a key to overcome this hurdle in the future: over the last years there have been several lines of work demonstrating that different types of metallic nanostrutures can be utilized to greatly enhance the magneto-optic response of conventional materials. In this review we give an overview over the state of the art in the field and highlight recent developments on hybrid plasmonic Faraday rotators. Our discussions are mainly focused on the visible and near-infrared wavelength regions and cover both experimental realizations as well as analytical descriptions. Special attention will be paid to recent developments on hybrid plasmonic thin film systems consisting of gold and europium chalcogenides.

中文翻译：

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非互易混合磁等离子体

法拉第效应描述了磁化材料可以改变透射光的偏振状态的现象。有趣的是，与自然界中的大多数光物质相互作用不同，它打破了洛伦兹互易性。这种特殊行为可用于光隔离器等应用，这些应用是通信和激光系统的核心元件。虽然对亚微米非互易光子器件有很高的需求，但这种系统的实现极具挑战性，因为传统的磁光材料只能在小体积内提供微弱的磁光响应。等离子体可能是未来克服这一障碍的关键：在过去的几年里，有几项工作表明可以利用不同类型的金属纳米结构来大大增强传统材料的磁光响应。在这篇综述中，我们概述了该领域的最新技术，并重点介绍了混合等离子体法拉第旋转器的最新发展。我们的讨论主要集中在可见光和近红外波长区域，涵盖实验实现和分析描述。将特别关注由金和铕硫属元素化物组成的混合等离子体薄膜系统的最新发展。我们的讨论主要集中在可见光和近红外波长区域，涵盖实验实现和分析描述。将特别关注由金和铕硫属元素化物组成的混合等离子体薄膜系统的最新发展。我们的讨论主要集中在可见光和近红外波长区域，涵盖实验实现和分析描述。将特别关注由金和铕硫属元素化物组成的混合等离子体薄膜系统的最新发展。