A Fullerene Based High Responsivity, Low Noise Superconducting Bolometer

最近碳二十面体分子和富勒烯的出现，以及碱掺杂富勒烯衍生物中超导性的发现，为研究超导器件开辟了新的途径。特别是，富勒化物预计将实现高性能的超导测热计。目前大多数超导红外传感器都采用了热测量机制，包括最近从高t陶瓷中开发的大多数超导红外传感器。热测量机制已被很好地理解，一个简单的热模型充分地预测了它们的热测量行为。使用该模型，基于丰度的超导体与超导陶瓷相比，预计在响应性（给定功率变化的信号变化）方面可以实现一到两个数量级的改进。此外，富勒烯相同的内在物理性质也预示着噪声等效功率（NEP）降低一个数量级。在第一阶段的项目中，Sigma建议使用环保测试电池测试富勒化物薄膜的红外响应性，为商用设备和阵列做准备。＊＊＊

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. ***