Structure-Enhanced Photoluminescence and Lasing in Aggregated Silver Films Coupled to Optically Amplifying Media

与光放大介质耦合的聚集银膜中的结构增强光致发光和激光发射

• 批准号: 1404676
• 负责人: Benjamin McMorran
• 金额: $ 39万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1404676&HistoricalAwards=false
• 关键词: Structure; Enhanced; Photoluminescence; Lasing; Aggregated

Non-technical Description: This study provides a scientific basis for the development of novel light emitting materials which are implemented to attain nanoscale lasers. The project utilizes a variety of microscopy and optical techniques to investigate the structural characteristics of these materials and their light emitting properties. The overarching goal of this study is to achieve cost efficient materials which may be readily fabricated on large scales, to yield new types of ultra-compact lasers. Students participating in this project are receiving broad interdisciplinary training in optical and materials sciences. Undergraduate students conduct research, working alongside graduate students, while learning a variety of materials fabrication and characterization techniques, computational methods and digital image analysis. The PI is leading efforts to improve undergraduate science literacy through the instruction of a newly developed course on the topic of Nanoscience and Society. The PI's commitment to increasing the representation of women in the scientific disciplines further leverages research activities to help broaden the participation of underrepresented groups.Technical Description: The project aims to develop active plasmonic materials comprising disordered silver films and amplifying media. A main challenge to implementation of random materials in device applications remains attaining materials in which nanoscale structural irregularities and local morphological variations do not impede desired device functionality. This research project addresses this challenge by aiming to develop active plasmonic materials whose optical properties are reproducibly controlled through the materials' statistical attributes. The structures under investigation comprise chemically grown aggregated silver films coupled to several model amplifying media. The approach utilizes a variety of spectroscopic, structural and numerical characterization techniques, and it intends to delineate fundamental relations between enhanced light emission and statistical structural characteristics in the fabricated materials. A set of studies aims to examine variations in light emission as the metal films evolve morphologically, and delineate scaling relations between light intensity and statistical characteristics. This part also addresses lasing phenomena in aggregated silver films coupled to amplifying media. A second set of studies addresses temperature controlled structure-enhanced plasmonic lasers, achieved in different gain systems, including plasmonic Si Raman lasers and Ag2O/Ag chromophore complexes, with the aim of developing robust control mechanisms to reliably tune amplified optical output.

非技术描述：这项研究为开发新型发光材料提供了科学基础，这些材料是用来获得纳米级激光的。该项目利用各种显微镜和光学技术来研究这些材料的结构特征及其发光特性。这项研究的首要目标是获得成本效益高、易于大规模制造的材料，以生产新型超紧凑型激光器。参与该项目的学生正在接受光学和材料科学方面的广泛跨学科培训。本科生从事研究，与研究生一起工作，同时学习各种材料制造和表征技术、计算方法和数字图像分析。通过教授一门新开发的关于纳米科学和社会的课程，PI正在领导提高本科生科学素养的努力。国际和平研究所致力于增加妇女在科学学科中的代表性，进一步利用研究活动帮助扩大代表不足的群体的参与。技术说明：该项目旨在开发由无序银膜和放大介质组成的活性等离子材料。在器件应用中实现随机材料的主要挑战仍然是获得纳米级结构不规则和局部形态变化不会阻碍期望的器件功能的材料。这项研究项目旨在开发活性等离子体材料，其光学性质可通过材料的统计属性进行可重复控制，从而解决这一挑战。研究中的结构包括化学生长的聚集态银膜与几种模型放大介质耦合。该方法利用了各种光谱、结构和数值表征技术，旨在描述增强的光发射与所制备材料的统计结构特征之间的基本关系。一系列研究旨在研究随着金属薄膜形态的演变，光发射的变化，并描绘光强度和统计特征之间的比例关系。这一部分还讨论了与放大介质耦合的聚集态银膜中的激光现象。第二组研究涉及在不同的增益系统中实现的温控结构增强型等离子激元激光器，包括等离子激元硅拉曼激光器和Ag2O/Ag生色团复合体，目的是开发可靠的控制机制来可靠地调谐放大的光输出。