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Novel Material Platforms with Reduced Dimensionality for Next Generation Ferroelectric Photonics

用于下一代铁电光子学的降维新型材料平台

基本信息

批准号：
173137387
负责人：
Professor Dr. Karsten Buse
金额：
--
依托单位：
Institut für Mikrosystemtechnik (IMTEK)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2014-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/173137387?language=en
关键词：
Novel Material Platforms Reduced Dimensionality

项目摘要

Ferroelectric lithium niobate crystals (LiNbO3) as well as lithium tantalate (LiTaO3) are very relevant materials for applications. They serve, e.g., as electro-optic modulators powering our information highways. They are also employed as frequency converters for realizing compact and efficient green lasers. Within the project we want to explore the peculiarities of two-, one-, and zero-dimensional crystals (films, stripes, nanocrystals). The reduction of the dimensionality promises new material properties, e.g., an improved poling behavior. We are looking for the fundamental issues, e.g., how the surfaces are terminated: Structural changes in proximity of the surface are expected, and defects and local charge accumulations may play an important role on these small length scales. Several experimental spectroscopic and microscopic methods will be employed, in conjunction with the development of theoretical considerations. The results may lead to new applications, e.g., ultrafast electro-optic modulation and the generation of terahertz waves. The complementary transatlantic team (Dierolf, Lehigh University, spectroscopy; Kip, Hamburg, integrated optics; Buse, Bonn, photosensitivity and crystal defects; Sohler, Paderborn, nonlinear Optics) is ideally suited to work successfully on this challenging project.

铁电钽酸锂晶体（LiNbO 3）以及钽酸锂（LiTaO 3）是与应用非常相关的材料。他们服务，例如，as electro-optic电光modulators调制器powering供电our information信息highways高速公路.它们也被用作频率转换器，用于实现紧凑和高效的绿色激光器。在这个项目中，我们希望探索二维，一维和零维晶体（薄膜，条纹，纳米晶体）的特性。维数的降低预示着新的材料性质，例如，改进的极化行为。我们正在寻找基本问题，例如，表面如何终止：预期表面附近的结构变化，缺陷和局部电荷积累可能在这些小的长度尺度上起重要作用。几个实验光谱和显微镜的方法将被采用，结合理论的发展考虑。结果可能导致新的应用，例如，超快电光调制和太赫兹波的产生。互补的跨大西洋团队（Dierolf，Lehigh大学，光谱学; Kip，汉堡，集成光学; Buse，波恩，光敏性和晶体缺陷; Sohler，Paderborn，非线性光学）非常适合在这个具有挑战性的项目上成功工作。