GOALI: Photodegredation of Electro-Optic Polymers

9522019斯蒂格曼聚合物光电子学在过去的五年中经历了快速的发展，并显示出相当大的光子学应用前景。然而，最近的论文表明，电光聚合物的累积光降解是一个严重的长期问题。在原型分子DAN的光谱的近红外和通信区域，测量到了折射率和波导损耗的巨大变化。一个由ROITECH的Alex Jen、加州理工大学的Seth Marder和中佛罗里达大学CREOL的George Stegeman组成的大学-产业合作研究小组将在GALI计划下调查这些问题。通过共享设施和专业知识，该小组将使用光学和分析化学技术来研究导致光降解的主要机制以及将其在通信频段中的影响降至最低的新方法。加速光学测试将模拟设备在典型设备运行功率下多年的性能。光降解会引起分子结构和光学性质的变化。这些变化将在DR1和DANS等知名分子中进行测量和关联。反式顺式异构化和入射光子引起的键的氧化和断裂等机制将被量化。我们将研究线性和多光子触发事件。旨在减少光降解效应的新分子将被设计、合成和评估。例如，具有比DAN或DR1窄得多的吸收光谱的分子将被研究，这些分子的吸收光谱相对于通信波段被战略性地放置。***

9522019 Stegeman Polymer opto-electronics has undergone rapid development in the last five years and has shown considerable promise for photonics applications. However, recent papers have shown that cumulative photodegradation of electro-optic polymers poses a serious long- term problem. Large changes in both the refractive index and waveguide losses have been measured in the near infrared and communications regions of the spectrum in the prototypical molecule DANS. A collaborative university-industry research team consisting of Alex Jen of ROITECH, Seth Marder of Caltech and George Stegeman of CREOL at the University of Central Florida will investigate these issues under a GOALI program. By sharing facilities and expertise, this team will use both optical and analytical chemical techniques to study both the major mechanisms responsible for photodegradation and new approaches to minimizing their effects in the communications bands. Accelerated optical testing will simulate device performance over many years at typical device operating powers. Photodegradation leads to changes in the molecular structure and optical properties. These changes will be measured and correlated in well-known molecules such as DR1 and DANS. Mechanisms such as trans-cis isomerization, and the oxidation and breaking of bonds by incident photons will be quantified. Both linear and multiphoton triggered events will be studied. New molecules designed to reduce photodegradation effects will be designed, synthesized and evaluated. For example, molecules with much narrower (than DANS or DR1) absorption spectra placed strategically relative to the communications bands are to be investigated. ***