Design, Construction and Optical Response Properties of Dye/Superconductor Assemblies

染料/超导体组件的设计、构造和光学响应特性

• 批准号: 9631394
• 负责人: John McDevitt
• 金额: $ 34.39万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-01-01 至 1999-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9631394&HistoricalAwards=false
• 关键词: Design; Construction; Optical; Response; Properties

9631394 McDevitt This research focuses on the design, fabrication and study of dye-superconductor assemblies. These dyesuperconductor systems are sensitive to the influence of light, making cryogenic optical switching processes possible. Initial work has shown that molecular dyes can be used to sensitize superconductor junctions to specific wavelengths of light. Optically sensitive assemblies which display rapid response time, high sensitivity and selective wavelength response characteristics have been prepared. The spectral response behavior of such systems correlate well with the absorbance properties exhibited by the dye layer. Since a large number of dyes with different spectral and photophysical properties can be incorporated into such systems, it is possible to prepare a plethora of structures which are tailored from the molecular level so as to suit a variety of different applications. Depending on the photophysical properties of the dye, systems which foster rapid and direct energy transfer between the dye and the superconductor can be fashioned. Other systems can be prepared which function through the propagation of thermal waves from the dye to the superconductor. Moreover, injection of "hot" (i.e. nonequilibrium) electrons can also be envisioned as an alternative method to induce a measurable electrical response in the superconductor. Interesting issues related to the efficiency of energy and electron transfer phenomena between excited dyes and superconducting interfaces can be explored for the first time with the use of highly oriented thin film structures. Important information related to the chemical compatibility between the molecular dye components and the cuprate compounds can be acquired through an evaluation of the superconductor interfacial properties before and after dye deposition. From the proposed studies, the following information is anticipated: 1.) Reliable methods to construct dye-superconductor assemblies will be identified. 2.) Che mical compatibility of molecular layers and high-Tc superconductors will be explored. This information will be useful not only for the development of the optical devices, but also will contribute to the more rapid development of traditional high-Tc thin film devices. 3.) The initial information related to dye-superconductor energy transfer processes will be obtained. 4.) The efficiencies of thermal wave, hot electron injection and direct dipole coupling energy transfer processes will evaluated. 5.) Systems which incorporate luminescent (fluorescent and phosphorescent), nonluminescent, photoconductive, electrochromic and photochromic dye structures will be evaluated to identify and to explore the various molecule/superconductor communication channels. 6.) This highly interdisciplinary program will not only target the development of a knowledge base in a novel new field of science, but will also serve as an excellent training grounds for future scientists in a strategically important area. %%% A broad program which targets the design, fabrication and characterization of dye/superconductor assemblies is described. Work completed in the Investigator's laboratory has already demonstrated that a number of dye systems can be used in combination with superconductor thin film elements to produce a variety of optically sensitive assemblies that respond selectively to different wavelengths of light. The utilization of the superconductors yield structures where very efficient energy transfer between the light harvesting dye layer and the superconductor occurs. The use of various molecular systems affords the opportunity to prepare a plethora of optical!y sensitive structures that can be tailored from the molecular level for a variety of applications. Studies of the dye/superconductor assemblies will yield useful information related to more effective processing methods that can be used for the more rapid commercialization of high-Tc devices. Moreover, the dye/superconductor platform should provide a convenient means to explore dye/dye and dye/superconductor energy and electron transfer phenomena. The ability of a hybrid superconducting assembly to sense different wavelengths of light in a controllable fashion may have important consequences for future application of superconducting sensors and devices.

9631394 McDevitt本研究的重点是染料超导体组件的设计，制造和研究。这些染料导体系统对光的影响很敏感，使低温光开关过程成为可能。最初的工作表明，分子染料可以用来使超导体结对特定波长的光敏感。已经制备了显示快速响应时间、高灵敏度和选择性波长响应特性的光学敏感组件。这种系统的光谱响应行为与染料层表现出的吸收特性很好地相关。由于大量具有不同光谱和光物理性质的染料可以被引入到这样的系统中，因此可以制备从分子水平定制的过多的结构，以适应各种不同的应用。根据染料的物理性质，可以形成促进染料和超导体之间快速和直接能量转移的系统。可以制备通过热波从染料传播到超导体而起作用的其他系统。此外，“热”（即非平衡）电子的注入也可以被设想为在超导体中引起可测量的电响应的替代方法。与激发染料和超导界面之间的能量和电子转移现象的效率有关的有趣的问题可以探索第一次使用高度取向的薄膜结构。分子染料组分和铜酸盐化合物之间的化学相容性相关的重要信息可以通过评估染料沉积前后的超导体界面性质来获得。从拟议的研究中，预计将获得以下信息：1。可靠的方法来构建染料超导体组件将被确定。2.）的情况。分子层和高温超导体的化学相容性将被探索。这些信息不仅有助于光学器件的发展，而且有助于传统高Tc薄膜器件的更快发展。3.）第三章将获得有关染料-超导体能量转移过程的初始信息。 4.）对热波、超热电子注入和直接偶极耦合能量传递过程的效率进行了评价。 5.）系统，将发光（荧光和磷光），非发光，光电导，电致变色和光致变色染料结构进行评估，以确定和探索各种分子/超导体的通信渠道。6.）这个高度跨学科的计划不仅将针对科学的一个新的新领域的知识基础的发展，但也将作为一个战略重要领域的未来科学家的优秀培训基地。 描述了一个广泛的计划，其目标是染料/超导体组件的设计，制造和表征。 研究人员实验室完成的工作已经证明，许多染料系统可以与超导体薄膜元件结合使用，以产生各种光学敏感组件，这些组件可以选择性地响应不同波长的光。超导体的利用产生其中在光捕获染料层和超导体之间发生非常有效的能量转移的结构。各种分子系统的使用提供了制备大量光学材料的机会！y敏感的结构，可以从分子水平定制，用于各种应用。染料/超导体组件的研究将产生有用的信息，更有效的处理方法，可用于更快速的商业化的高Tc设备。 此外，染料/超导体平台应该提供一个方便的手段来探索染料/染料和染料/超导体的能量和电子转移现象。混合超导组件以可控方式感测不同波长的光的能力可能对超导传感器和设备的未来应用具有重要影响。