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Superconducting optical photon-counting detectors for astronomy

用于天文学的超导光学光子计数探测器

基本信息

批准号：
1641674
负责人：
金额：
--
依托单位：
University of Cambridge
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2015
资助国家：
英国
起止时间：
2015 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=studentship-1641674
关键词：
Superconducting optical photon counting detectors

项目摘要

Superconducting detectors are used extensively for astronomy throughout most of the electromagnetic spectrum: submillimetre-wave to X-ray. They have not, however, displaced CCD's in the optical part of the spectrum despite their ability to achieve time-resolved optical photon counting spectroscopy. There is one Group in the US that is working on optical superconducting imaging arrays, and they largely dominate the field. The purpose of the PhD project is to carry out modelling, manufacture, and testing of optical KIDs. We already have devices manufactured, which we have never tested, and so the work can get off to a rapid start. A key part of the project will be to build up the infrastructure needed for testing the optical behaviour of devices at low temperatures. The work will focus on understanding the physics of optical KIDs, particularly with respect to how to achieving high optical efficiencies. We have considerable experience in understanding the the non-equilibrium behaviour of superconductors under microwave and optical illumination , and the dynamical behaviour of superconducting resonators on membranes, and this understanding can be used to underpin our analysis of photon-counting KIDs. The devices we currently manufacture comprise resonators on membranes, and superconducting optical absorbers with integrated backing reflectors, and the PhD will focus on modelling and measuring these devices. In due course, the student will design and manufacture a second generation of devices. This work will be carried out in collaboration with a number of international organisations.

超导探测器广泛应用于天文学的大部分电磁频谱：从亚毫米波到X射线。然而，尽管它们有能力实现时间分辨的光学光子计数光谱学，但它们在光谱的光学部分并没有取代CCD。在美国，有一个小组正在研究光学超导成像阵列，他们在这一领域占据主导地位。博士项目的目的是对光学儿童进行建模、制造和测试。我们已经制造了设备，但我们从未测试过，因此工作可以快速开始。该项目的一个关键部分将是建立测试设备在低温下的光学行为所需的基础设施。这项工作将集中在理解光学儿童的物理学，特别是关于如何实现高光学效率。我们在理解超导体在微波和光学照射下的非平衡行为，以及膜上超导谐振器的动力学行为方面有相当多的经验，这种理解可以用来支持我们对光子计数孩子的分析。我们目前制造的器件包括膜上谐振器和带有集成后备反射器的超导光吸收器，PHD将专注于对这些器件进行建模和测量。在适当的时候，学生将设计和制造第二代设备。这项工作将与一些国际组织合作开展。