Astronomy Detector Array Applications

天文学探测器阵列应用

• 批准号: 9160207
• 负责人: Peter Chow
• 金额: $ 4.97万
• 依托单位: Superior Vacuum Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-03-15 至 1992-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9160207&HistoricalAwards=false
• 关键词: Astronomy; Detector; Array; Applications

As an alternative to mercury-cadmium telluride (MCT), this program will investigate the optical properties of a recently invented class of type II strained-layer superlattices made of (GA,As) related compounds. The new concept has advantages compared with previous efforts in that small band-gaps may be achieved with sufficiently thin repeating layers in the superlattices so that they have good optical absorption properties and favorable electrical transport properties original calculations have indicated Ga1-xInxSb/InAs to be the best choice for such application. Very recently it has been shown to have the highest absorption coefficient at 10um wavelength compared to all other superlattice materials. To explore the potential of this material system, the investigators will fabricate the detector device structures by a multi-process molecular beam epitaxy technique in which the detector layers, passivation and metallization are all done in-situ.

作为碲镉汞（MCT）的替代品， 该计划将调查最近的光学性质 发明的II型应变层超晶格， (GA，As）相关化合物。 新概念有优势 与以前的努力相比，小的带隙可能 通过在该层中足够薄的重复层来实现 使它们具有良好的光吸收 性能和良好的电输运性能 计算表明Ga_（1-x）In_xSb/InAs是最佳选择 对于这样的应用。 最近的研究表明， 与之相比，10 um波长处的吸收系数最高 其他超晶格材料。 为了探索 这个材料系统，调查人员将编造 多工艺分子束探测器装置结构 外延技术，其中检测器层、钝化层和 金属化全部在原位完成。