ROW: Fabrication of High Tc Superconductor Thin-Film Micro- bridges for Millimeter-Wave Detection and Mixing

ROW：用于毫米波检测和混合的高温超导薄膜微桥的制造

• 批准号: 8908533
• 负责人: Zeynep Celik-Butler
• 金额: $ 5.44万
• 依托单位: Southern Methodist University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-07-01 至 1990-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8908533&HistoricalAwards=false
• 关键词: ROW; Fabrication; Tc; Superconductor; Thin

The PI will prepare high-transition temperature superconductive films by deposition onto cooled substrates. Reactive sputtering and hot oxygen jet sputter fabrication techniques will be employed to produce as-deposited high-quality YBa2Cu3O7-x thin-films. After the initial investigation of the composition, microstructure and the DC electrical properties, these films will be patterned into variable thickness microbridges for millimeter-wave detection and mixing applications. Special emphasis will be given to the repeatability of the fabrication process as it applies to the transition temperature, critical current, and properties under radiation. In the second stage of the investigation, the microbridges will be used as heterodyne detectors in the millimeter-wave range. We have in our laboratories a good collection of active devices (sources, oscillators, detectors, mixers, isolators) and passive components in the 94 GHz range. The first goal will be to investigate the microwave properties of the microbridges by pumping with an rf source at this frequency. Then the microbridge will be operated as a mixer. The conversion efficiency, and mixer noise will be measured.

PI 将通过沉积到冷却的基底上来制备高转变温度超导薄膜。 将采用反应溅射和热氧喷射溅射制造技术来生产沉积态高质量 YBa2Cu3O7-x 薄膜。 在对成分、微观结构和直流电性能进行初步研究后，这些薄膜将被图案化为可变厚度的微桥，用于毫米波检测和混合应用。 将特别强调制造过程的可重复性，因为它适用于转变温度、临界电流和辐射下的性能。 在研究的第二阶段，微桥将用作毫米波范围的外差探测器。 我们的实验室拥有大量 94 GHz 范围内的有源器件（信号源、振荡器、检测器、混频器、隔离器）和无源器件。 第一个目标是通过射频源在此频率下泵浦来研究微桥的微波特性。 然后微桥将作为混合器运行。 将测量转换效率和混频器噪声。