权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Resonant cavity detectors and their materials, for spectroscopic chemical detection

用于光谱化学检测的谐振腔探测器及其材料

基本信息

批准号：
2142954
负责人：
金额：
--
依托单位：
Lancaster University
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2018
资助国家：
英国
起止时间：
2018 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2142954
关键词：
Resonant cavity detectors their materials

项目摘要

The project is aiming to create and study infrared detectors for spectroscopic detection, primarily aimed at substances that require more sensitive detectors than are currently available. The detectors will be resonant cavity enhanced (a mirror is placed either side of the active layer) to improve spectral selectivity. These detectors are still in the research realm, with their demonstration yet to be achieved in some important wavelength ranges, and some open questions regarding their operation and the reconciliation of theory and experimental data. For example one important target of the project is to experimentally prove that the maximum sensitivity of resonant cavity detectors can be above the theoretical limit for standard detectors, as it is predicted to be. This has not yet been achieved. If the project were condense to two questions they would be "can resonant cavity detectors be achieved in the short and long wave infrared" and "can their measured performance be fully reconciled with their theory, or does this need modifying". The detectors will be modelled and designed by the student. They will grow it by molecular beam epitaxy (MBE) using InGaAsSb absorbers for short wave detectors (1.4 to 3.0 micro meters), InAsSb or super lattice absorbers for mid wave detectors (3 to 5 micro meters) and super lattice absorbers for long wave detectors (8 to 12micro meters). They will process in our cleanroom and characterise thein the lab for leakage current, spectral response and quantum efficiency in particular. The student will complete all this work, publishing their result. We expect this PhD to advance understanding in the materials used and the physical understanding of resonant cavity detectors, in particular their leakage current mechanisms. This will also by extension improve understanding of conventional detector device physics, which the resonant cavity design is attempting to push towards a limit.EPSRC research area: photonic materials and devices

该项目旨在创建和研究用于光谱检测的红外探测器，主要针对需要比目前更灵敏的探测器的物质。探测器将被谐振腔增强（反射镜放置在有源层的两侧），以提高光谱选择性。这些探测器仍处于研究阶段，在一些重要的波长范围内尚未进行演示，关于它们的操作以及理论和实验数据的协调也存在一些悬而未决的问题。例如，该项目的一个重要目标是通过实验证明谐振腔探测器的最大灵敏度可以高于标准探测器的理论极限，正如预测的那样。这一点尚未实现。如果将该项目浓缩为两个问题，那就是“谐振腔探测器能否在短波和长波红外线中实现”以及“它们的测量性能能否与理论完全一致，或者是否需要修改”。探测器将由学生建模和设计。他们将通过分子束外延（MBE）使用InGaAsSb吸收剂用于短波探测器（1.4至3.0微米），InAsSb或超晶格吸收剂用于中波探测器（3至5微米）和超晶格吸收剂用于长波探测器（8至12微米）。他们将在我们的无尘室中进行处理，并在实验室中进行测试，特别是泄漏电流、光谱响应和量子效率。学生将完成所有这些工作，公布他们的结果。我们希望这个博士学位能够促进对所用材料的理解和对谐振腔探测器的物理理解，特别是它们的漏电流机制。这也将通过扩展提高对传统探测器器件物理的理解，而谐振腔设计正试图将其推向极限。EPSRC研究领域：光子材料和器件