Nonreciprocity at telecom wavelengths

非技术摘要：这个项目的总体目标是探索一系列含Er的多铁体中的非互易性，并投资于田纳西大学不同群体的年轻人的教育。这两项倡议都值得广泛支持，因为它们将促进对超低对称性材料单向透明度的基本理解，并为重要的社会价值和成果做出贡献。为了集中我们的努力，我们将专注于C波段电信制度中的非互易性--特别是在目前使用Er玻璃纤维的1550 nm处--并选择了几种不同的含Er系统，使用国家强磁场实验室的高场光谱来测试这些想法。在这项由国家科学基金会资助的计划下，还将开展广泛的教育、外展和服务活动，特别是在多样性、会议和研讨会组织以及为各种国家实验室提供服务方面。技术摘要：本提案中概述的研究建立在我们团队最近发现的Ni3TeO6电信波长范围内的非互易方向二向色性的基础上。考虑到拉制的Er玻璃光纤在光通信中的商业应用，我们假设像Er取代的YMnO_3、Er掺杂的Ni3TeO_6、ErFe_3(BO_3)_4和ErFeO_3这样的多铁性材料可能提供破坏的对称性、低损耗的环境，在这种环境中，改变磁场或光传播方向可以产生光学二极管效应。我们的目标是(I)揭示拥有不寻常对称性和性质的物质的新状态，(Ii)探索超低对称性如何产生动态磁电耦合和非互易性，(Iii)测试在C带区域放置二向色性对比的策略，(Iv)揭示与非互易性相关的结构-性质关系，以及(V)发现如何增强和控制这些效应。将这些努力聚集在一起的是探索极端条件下全新类型的光-物质相互作用的机会。该项目的发现将推动理论发展和光子学应用。该计划还支持为未来在量子材料领域的学术、政府实验室和行业工作而对不同的年轻研究人员进行跨学科教育。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

Non-technical abstract: The overall goals of this program are to explore nonreciprocity in a series of Er-containing multiferroics and to invest in the education of a diverse group of young people at the University of Tennessee. Both initiatives merit broad support because they will advance the fundamental understanding of one-way transparency in ultra-low symmetry materials and contribute to important societal values and outcomes. To focus our efforts, we will concentrate on nonreciprocity in the C-band telecom regime – particularly at 1550 nm where Er glass fibers are currently in use – and several different Er-containing systems have been selected to test these ideas using high field spectroscopies at the National High Magnetic Field Laboratory. A broad range of educational, outreach, and service activities will also take place under the auspices of this National Science Foundation-funded program, especially in the areas of diversity, conference and workshop organization, and service to various national laboratories.Technical abstract: The research outlined in this proposal builds upon our team’s recent discovery of nonreciprocal directional dichroism across the telecom wavelength range in Ni3TeO6. Given the commercial use of drawn Er-glass fibers for optical communications, we hypothesize that multiferroics like Er-substituted YMnO3, Er-doped Ni3TeO6, ErFe3(BO3)4, and ErFeO3 may offer broken symmetry, low loss environments in which changing magnetic field or light propagation direction can create optical diode effects. Our goals are to (i) reveal new states of matter hosting unusual symmetries and properties, (ii) explore how ultra-low symmetries generate dynamic magnetoelectric coupling and nonreciprocity, (iii) test strategies for placing dichroic contrast in the C-band region, (iv) unravel structure-property relations connected with nonreciprocity, and (v) discover how these effects can be enhanced and controlled. What brings these efforts together is the opportunity to explore completely new types of light-matter interactions under extreme conditions. Findings from this program will advance theoretical development and photonics applications. This program also supports the interdisciplinary education of a diverse group of young researchers for future employment in academics, government laboratories, and industry in the area of quantum materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.