Domain Microengineered Ferroelectrics for Novel Chip-size Integrated Electro-optic Devices

用于新型芯片尺寸集成电光器件的微工程铁电体

• 批准号: 9988685
• 负责人: Venkatraman Gopalan
• 金额: $ 21万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2004-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9988685&HistoricalAwards=false
• 关键词: Domain; Microengineered; Ferroelectrics; Novel; Chip

With the advent of fiber-optic networks and integrated optical devices that process photons, the future in communications is clearly moving towards the optical regime. The central theme of this proposal is to explore ferroelectric materials, which possess a built-in spontaneous polarization in their crystal structure, as a solid state platform for integrated optical devices. In particular, this proposal focuses on ferroelectric lithium niobate (LiNbO3 ) and lithium tantalate (LiTaO3 ) which have emerged as key materials in integrated and nonlinear optics due to their excellent nonlinear optical properties and the ability to be grown as large single crystals. The phenomena of ferroelectric domains (which are regions of uniform spontaneous polarization) and their patterning into diverse shapes by external forces is the key to many integrated optics applications. However, the process of domain microengineering, remains at best an inexact science even today. This is principally due to the lack of a fundamental understanding of domain dynamics under external forces that are used to control them.A comprehensive research plan is outlined which encompasses fundamental new studies of thedomain phenomenon in ferroelectric materials using real-time optical probes, investigation of new techniques for microengineering ferroelectric domains, and the application of this knowledge towards the design and fabrication of novel electro-optic devices with unprecedented scanning and focusing performances integrated on a single ferroelectric chip.

随着光纤网络和处理光子的集成光学设备的出现，通信的未来显然正朝着光学制度发展。该提案的中心主题是探索铁电材料，该材料在其晶体结构中具有内置自发极化，作为集成光学设备的固态平台。特别是，该提案的重点是尼伯特铁锂（Linbo3）和坦率锂（Litao3），它们由于其出色的非线性光学特性而作为集成和非线性光学元件的关键材料出现，并且能够将其作为大型单晶生长。铁电域的现象（是均匀自发极化的区域）及其外部力量将其模式化为各种形状，是许多集成光学应用的关键。但是，即使在今天，域微工程的过程充其量仍然是一门不精确的科学。这主要是由于缺乏对外部力量下的域动态的基本理解，用于控制它们。概述了一项全面的研究计划，其中包含了使用实时光学探针在铁电材料中对thedomain现象的基本研究，并使用新知识的新技术来研究这种新技术，并涉及该知识的新知识，并且是针对这种知识的应用，并且是针对这种知识的应用。集成在单个铁电芯片上的空前的扫描和聚焦性能。