A Nanomagnetic Route to Bias-Magnet-Free On-Chip Faraday Rotators

本研究的目的是制造用于超小型光隔离器和旋转传感器的无偏磁片上法拉第旋转器。该方法是在磁性薄膜上开发具有磁性纳米粒子谐振腔的光子晶体波导，以提高这些技术中使用的核心部件的极化旋转效率和光速控制性能。通过在光子带隙中引入单畴磁性纳米颗粒，该项目旨在证明光子晶体法拉第旋转器的高度矫顽力、法拉第旋转增强和光学时间延迟，同时避免了对外部磁铁的需要。开发超小型无磁光隔离器的基本原理是解决芯片性能互连瓶颈和维持信息传输介质容量增长的经济需要。电信业长期以来一直积极追求这一目标，但许多因素阻碍了这一目标的实现。现在晶体生长的进展和磁光子晶体的发展在这里提出解决这些因素。同时，磁性光子晶体提供的极端光速度控制解决了另一个关键的技术问题，即为飞机，卫星和弹丸的惯性参考系统开发超小型和更精确的光学陀螺仪。通过杜邦光子学和集成光子学公司与工业界建立合作伙伴关系。通过参与密歇根理工大学女性工程项目，该活动旨在让女高中生参与科学探索。密歇根理工大学将利用与德克萨斯州立大学（Texas State University）的关系来促进少数族裔的招聘。

The objective of this research is the fabrication of bias-magnet free on-chip Faraday rotators for ultra-small optical isolator and rotation sensor applications. The approach is to develop photonic crystalwaveguides with magnetic nanoparticle resonators on magnetic films to enhance the polarization rotation efficiency and light speed control properties of the core components used in these technologies. By introducing single-domain magnetic nanoparticles in the photonic bandgap the project seeks to demonstrate a high degree of coercivity, Faraday rotation enhancement and optical time delay in photonic crystal Faradayrotators while obviating the need for external magnets.The rationale for developing ultra-small magnet-free optical isolators is the economic need to address the interconnection bottleneck to chip performance and sustain the growth of capacity in informationtransmission media. This goal has long been actively pursued by the telecommunications industry but a number of factors have prevented its realization. Now advances in crystal growth and the development of themagnetic photonic crystals proposed here address these factors. At the same time, the extreme optical speed control afforded by magnetic photonic crystals addresses another critical technological question, namely, the development of ultra-small and more accurate optical gyroscopes for inertial reference systems in aircraft, satellites and projectiles. Partnerships with industry through Dupont Photonics and Integrated Photonics, Inc. are being pursued. Through its participation in the Michigan Tech Women in Engineering Program the proposed activity intends to involve female high-school students in science exploration. Ties with Texas State University will be used to promote minority recruitment at Michigan Tech.