Optical modeling of waveguide coupled TES detectors towards the SAFARI instrument for SPICA
Optical modeling of waveguide coupled TES detectors towards the SAFARI instrument for SPICA
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针对 SPICA SAFARI 仪器的波导耦合 TES 探测器的光学建模
DOI：
10.1117/12.926760
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
S. Withington
中科院分区：
文献类型：
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作者：
N. Trappe;C. Bracken;S. Doherty;J. Gao;D. Glowacka;D. Goldie;D. Griffin;R. Hijmering;B. Jackson;P. Khosropanah;P. Mauskopf;D. Morozov;A. Murphy;C. O'sullivan;M. Ridder;S. Withington
下一代以远红外波长为目标的太空任务将需要大型极灵敏探测器阵列。过渡边缘传感器（TES）阵列技术的开发是为了未来的远红外空间应用而开发的，例如SPICA的SAFARI仪器，其中要求低噪声和高灵敏度以实现雄心勃勃的科学目标。在本文中，我们描述了多模喇叭天线馈电集成腔TES探测器与超导薄膜吸收器的模态分析。在高灵敏度TES检测器技术中，控制检测器的电磁和热机械环境的能力是关键的。模拟和理解这种探测器在远红外波长下的光学行为是困难的，需要开发现有的分析工具。所提出的模态方法提供了一种计算效率高的技术来描述的光效率和像素之间的功率泄漏方面的全像素的部分相干响应。作为欧空局技术研究项目光学分析的一部分进行的初始工作进行了描述和原型SAFARI像素设计进行了分析，其中入射场和像素之间的光耦合包含喇叭，腔与空气间隙，和薄吸收层都包括在模型中，以允许全面的光学特性。所描述的模态方法是基于模式匹配技术，其中喇叭和腔体以传统方式描述，同时开发了包括吸收体的技术。像素之间的辐射泄漏也包括在内，使其成为一个强大的分析工具。
The next generation of space missions targeting far-infrared wavelengths will require large-format arrays of extremely sensitive detectors. The development of Transition Edge Sensor (TES) array technology is being developed for future Far-Infrared (FIR) space applications such as the SAFARI instrument for SPICA where low-noise and high sensitivity is required to achieve ambitious science goals. In this paper we describe a modal analysis of multi-moded horn antennas feeding integrating cavities housing TES detectors with superconducting film absorbers. In high sensitivity TES detector technology the ability to control the electromagnetic and thermo-mechanical environment of the detector is critical. Simulating and understanding optical behaviour of such detectors at far IR wavelengths is difficult and requires development of existing analysis tools. The proposed modal approach offers a computationally efficient technique to describe the partial coherent response of the full pixel in terms of optical efficiency and power leakage between pixels. Initial wok carried out as part of an ESA technical research project on optical analysis is described and a prototype SAFARI pixel design is analyzed where the optical coupling between the incoming field and the pixel containing horn, cavity with an air gap, and thin absorber layer are all included in the model to allow a comprehensive optical characterization. The modal approach described is based on the mode matching technique where the horn and cavity are described in the traditional way while a technique to include the absorber was developed. Radiation leakage between pixels is also included making this a powerful analysis tool.