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Superconducting Bolometers for millimeter and submillimeter wavelengths

机译：适用于毫米和亚毫米波长的超导Bolometer

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摘要

We present the experimental results and a bolometer model of the voltage-biased superconducting bolometer on the low stress silicon nitride (Si_3N_4) membrane, developed in collaboration between the Max-Planck-Institut fiir Radioastronomie (MPIfR), Bonn and the Institute for Photonic Technology (IPHT), Jena, Germany. The superconducting thermistor, deposited on the low stress silicon nitride membrane, is a bilayer of gold-palladium and molybdenum and is designed for a transition temperature of 450 mK. Bolometers for the 1.2 mm atmospheric window were designed, built and tested. The thermal conductance of the bolometer is tuned by structuring the silicon nitride membrane into spider-like geometries. The incident radiation is absorbed by crossed dipoles made from gold-palladium alloy with a surface resistance of 10 Ω/square. Using the COSMOS finite element analysis package, the thermal conductance is obtained for the bolometers of different geometries. FEA simulations showed that the deposition of a gold ring around the absorbing area could increase the sensitivity of the bolometer. Therefore, a gold ring is deposited around the center absorbing patch of the silicon nitride membrane. For the bolometer with a gold ring, the measured NEP is 1.7 × 10~(-16)W/Hz~(1/2) and the time constant is in the range between 1.4 and 2 ms.
机译：我们介绍了实验结果和低应力氮化硅（Si_3N_4）膜上的偏压超导测辐射热计的辐射热计模型，该模型是由马克斯·普朗克研究所射电天文学（MPIfR），波恩和光子技术研究所合作开发的（IPHT），德国耶拿。沉积在低应力氮化硅膜上的超导热敏电阻是金-钯和钼的双层，设计用于450 mK的转变温度。设计，制造和测试了用于1.2毫米大气压窗口的气压计。通过将氮化硅膜结构化为蜘蛛状的几何形状，可以调整辐射热计的热导率。入射辐射被金-钯合金制成的交叉偶极子吸收，其表面电阻为10Ω/平方。使用COSMOS有限元分析软件包，可以获取不同几何形状的辐射热计的热导率。 FEA仿真表明，在吸收区域周围沉积金环可以提高辐射热测量仪的灵敏度。因此，金环沉积在氮化硅膜的中心吸收片周围。对于带金环的辐射热计，测得的NEP为1.7×10〜（-16）W / Hz〜（1/2），时间常数在1.4到2 ms之间。

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