A Fullerene Based High Responsivity, Low Noise Superconducting Bolometer

基于富勒烯的高响应度、低噪声超导测辐射热计

• 批准号: 9360860
• 负责人: Theodore Miller
• 金额: $ 6.5万
• 依托单位: SIGMA TECHNOLOGIES INTL., INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-04-01 至 1994-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9360860&HistoricalAwards=false
• 关键词: Fullerene; Based; Responsivity; Low; Noise

9360860 Miller The recent availability of the carbon icosohedral molecules, the fullerenes, and the discovery of superconductivity in alkali doped fullerene derivatives opens anew avenues of investigation into superconducting devices. In particular, the fullerides are predicted to achieve high performance as superconducting bolometers. Most of the current superconducting infrared sensors have utilized bolometric mechanisms, including most of those developed recently from the high-T ceramics. The bolometric mechanisms are well understood, and a simple thermal model adequately predicts there bolometric behavior. Using that model the fullerence based superconductors are predicted to achieve a one to two order of magnitude improvement in responsivity (change of signal for a given change in power) in comparison to the superconducting ceramics. Additionally, the same intrinsic physical properties of the fullerenes predict a reduction of the Noise-Equivalent-Power (NEP) by an order of magnitude as well. the combination of benefits can yield a three order of magnitude improvement in the specific detectivity, D. In the Phase I project, Sigma proposes to test the IR responsivity of fulleride films using environmentally protecting test cells in preparation for commercial devices and arrays. ***

9360860 Miller最近碳二十面体分子、富勒烯的可用性以及在碱掺杂富勒烯衍生物中超导电性的发现为超导器件的研究开辟了一条新的途径。特别值得一提的是，富勒化物有望实现超导测辐射热计的高性能。目前的大多数超导红外传感器都利用了测辐射机制，包括最近开发的大多数高温陶瓷。测辐射热学的机制是很清楚的，一个简单的热模型就能很好地预测这种测辐射热行为。利用该模型预测，与超导陶瓷相比，基于富勒度的超导体在响应度(给定功率变化时信号的变化)方面将提高一到两个数量级。此外，富勒烯的相同固有物理性质也预示着噪声等效功率(NEP)将降低一个数量级。在第一阶段项目中，Sigma建议使用环保测试单元测试富勒里德薄膜的红外响应性，为商业设备和阵列做准备。***