Materials World Network: Complex Oxides for Heterogeneous Optoelectronic Integration

技术摘要：这项美英材料世界网络合作的重点是通过将掺杂的钇铁石榴石和铌酸锂分别集成到III-V结构上，增加磁光(MO)和电光(EO)特性，这些特性比目前半导体光子学可用的特性大几个数量级。在源极集成光子集成电路和电子可重构光电集成电路等动机的推动下，人们开始了在半导体平台上添加MO和EO材料的紧张工作。然而，复合氧化物的集成需要热结晶方法以及热膨胀失配、衬底解离和界面扩散。这项工作旨在收敛到一种解决方案，包括使用缓冲层和种子层(均为~10 nm)的受控应变和界面、氧化物图案化和快速热处理，以最大限度地减少热处理。随后在较厚的薄膜中进行掺杂，以满足最大化MO或EO活性的要求。对材料的光学、磁学和电学性质进行了表征，分析了材料的结构和组成，并在精心设计的波导结构上测试了材料的性能。在MO整合的情况下，非互惠有望在没有高功率选项的情况下实现。集成铁电氧化物还可以在短期和长期应用中打开EO功能的大门，例如有源调频和可重新配置的光子。非技术摘要：这项研究项目是美国和英国科学家的合作项目。这项研究的重点是磁光和电光材料与半导体材料的集成，为增强磁光活性等新特性打开大门，以及诸如光子隔离器等新器件，从而使光源可以与光子集成电路集成。该团队在网上开会时使用了一些工具，使与会者能够看到彼此的脸、文字和幻灯片，并听到彼此的声音。这些工具的教育学将是一个有趣的侧面研究。此外，学生们在彼此的实验室里交换时间，以获得与新文化和新科学的重要经验。预计在国际研究中开发的在线/交流互动模式将在未来扩展到美国-肯尼亚和英国-巴基斯坦的合作-建立在已经在进行的关系的基础上。该项目得到了电子和光子材料计划和材料研究部特别计划办公室的支持。

TECHNICAL SUMMARY: This US-UK Materials World Network collaboration focuses on adding magneto-optical (MO) and electro-optical (EO) properties that are orders of magnitude greater than currently available to semiconductor photonics by integrating both doped yttrium iron garnet and lithium niobate, respectively, onto III-V structures. With motivations such as source-integrated photonic integrated circuits and electronically-reconfigurable opto-electronic integrated circuits, there has been intense work on adding MO and EO materials to semiconductor platforms. However, complex oxide integration requires thermal crystallization methods together with thermal expansion mismatch, substrate dissociation, and interfacial diffusion. This work aims to converge on a solution involving controlled strain and interfaces using buffer layers and seed layers (both ~10 nm), oxide patterning, and rapid thermal annealing for minimized thermal treatment. Subsequent doping in thicker films is used to meet specifications of maximized MO or EO activity. The optical, magnetic, and electronic properties are characterized to analyze the both the structures and compositions, and the materials performance is tested on carefully designed waveguide structures. In the case of MO integration, non-reciprocity is expected to be realized without the high-power options. Integrated ferroelectric oxides also unlocks doors to EO functionality in both near and long term applications, such as active frequency modulation and reconfigurable photonics.NON-TECHNICAL SUMMARY: This research project is a collaboration between US and UK scientists. The research focuses on integration of magneto-optical and electro-optical materials with semiconductor materials, opening doors for novel properties such as enhanced magneto-optical activity and new devices such as photonic isolators so that optical sources can be integrated with photonic integrated circuits. The team meets online with tools that enable attendees to see each other's faces, writings and slides, and to hear each other's voices. The pedagogy of these tools will be an interesting side study. In addition, students exchange time in each other's lab to gain important experience with new cultures and new science. It is anticipated that the online/exchange interaction model developed here in international research will be extended to US-Kenya and UK-Pakistan collaborations in the future - building on relationships that are already underway. This project is supported by the Electronic and Photonic Materials program and Office of Special Programs, Division of Materials Research.