Bulk/Film Structural Comparison of Chalcogenide Glasses for Waveguide Applications

基于硫化砷（As2S3）玻璃的光学元件自20世纪60年代后期这些玻璃的发展以来已广泛用于红外光学应用。在过去的几年中，As2S3和相关的硫系玻璃已被用于各种基于体、薄膜或光纤形式的新型光学元件中。这个为期三年的多学科研究项目将研究存在于大块砷硫硒玻璃和沉积玻璃薄膜之间的基本结构和光学特性差异，这些玻璃薄膜将用于集成光学器件系统中发现的多层薄膜波导。该项目旨在确定玻璃中潜在的化学和结构差异，并评估这种差异对所得波导光学性能的影响。将研究玻璃膜与母材玻璃的结构和组成（包括化学计量和键合变化）差异，以及这些差异与加工条件（熔融与气相沉积）的关系。表面和大块玻璃结构工具，如XPS， EXAFS和选定的光谱技术将用于识别结构特征的差异。薄膜沉积条件决定了结构单元如何形成并组装成稳定和亚稳态构型，将通过拉曼光谱和其他技术来表征。将确定块状和薄膜形式的硫系玻璃的关键结构单元的身份，以及单位浓度的相对差异对物理性质（包括线性和非线性光学）的作用。将确定沉积膜结构和性能的稳定性以及内部和外部玻璃缺陷对玻璃结构，光学行为和稳定性的作用。最后，研究了光相互作用下玻璃薄膜的结构修饰及其对玻璃结构和器件最终光学性能的影响。本项目的目的是评估当块状硫系玻璃经过薄膜加工程序时，其成分、结构、物理性质和光学性能的变化，这种薄膜加工程序通常用于生产集成光学器件系统中使用的多层薄膜波导。该项目将由一个由国际多学科研究小组组成的研究小组执行，该小组由来自中佛罗里达大学光学和激光研究与教育中心（CREOL）和先进材料加工与分析中心（AMPAC）、拉瓦尔大学光学、光子学和激光中心（加拿大魁北克）的研究人员组成。法国国家科学研究中心（波尔多）的波尔多物质化学研究所（波尔多）。这些团体之间有着持续的关系，这将促进项目的教师和学生交流，进一步扩大项目对参与机构的技术和教育项目的影响

9974129Cerqua-RichardsonOptical components based on arsenic sulfide (As2S3) glasses have been widely used for infrared optical applications since the development of these glasses in the late 1960's. During the past several years, As2S3 and related chalcogenide glasses have found use in a variety of novel optical components based on bulk, film, or fiber forms. This three year, multidisciplinary research project will examine the fundamental structural and optical property differences that exist between bulk arsenic-sulfur-selenium glasses and the as-deposited glass films as would be used in the multilayer thin film waveguides found in integrated optical device systems . The project aims to identify the underlying chemical and structural differences in the glasses and assess the ramifications of such differences on the optical performance of the resulting waveguide. The structural and compositional (including stoichiometric and bonding variations) differences in glass film versus parent bulk glass, and how these differences relate to processing conditions (melting versus vapor deposition) will be examined. Surface and bulk glass structural tools such as XPS, EXAFS and selected spectroscopic techniques will be used to identify differences in structural features. Film deposition conditions, which dictate how structural units form and assemble into stable and metastable configurations, will be characterized by Raman spectroscopy and other techniques. The identity of key structural units in bulk and film forms of chalcogenide glasses and the role that relative differences in unit concentrations play on physical properties (including linear and nonlinear optical) will be identified. The stability of as-deposited film structure and properties and the role of intrinsic and extrinsic glass defects on the glass structure, optical behavior, and stability will be determined. Finally, the structural modification that occurs in glass films with light interaction and the impact on glass structure and ultimate device optical performance will be investigated. %%%The objective of this project is to assess what variation in composition, structure, physical properties, and optical performance result when bulk chalcogenide glasses undergo thin film processing procedures commonly used in the production of multilayer thin film waveguides used in integrated optical device systems. This project will be performed by a Focussed Research Group consisting of an international, multidisciplinary team of researchers from the Center for Research and Education on Optics and Lasers (CREOL) and the Advanced Materials Processing and Analysis Center (AMPAC) at the University of Central Florida, the Center for Optics, Photonics and Lasers at the Universite de Laval (Quebec, Canada), and the Institut de Chimie de la Matiere Condensee Bordeaux of the Centre National de la Recherche Scientifique (Bordeaux, France). These groups have and on-going relationship that will facilitate the faculty and student exchange part of the project, further broadening the project's impact on technological and educational programs at the participating institutions.***