Development of a broadband anti-reflection coating for use in a cosmic microwave background polarization experiment

开发用于宇宙微波背景偏振实验的宽带减反射涂层

• 批准号: 24740182
• 负责人: MATSUMURA Tomotake
• 金额: $ 2.91万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24740182/
• 关键词: ミリ波; 宇宙マイクロ波背景放射; インフレーション; 広帯域反射防止膜; 偏光; 誘電体; 微細加工; 極低温; 光学素子・装置・材料; 宇宙物理（実験）

The measurements of the cosmic microwave background polarization can provide the tool to probe the inflationary paradigm. One of the key features in the measurements is to cover the broad bandwidth and the corresponding optical system. Traditionally the broadband anti-reflection coating is done by applying the multi-layer on an optical components. At the cryogenic temperature the multi-layer coating tends to peel off and this has never be established as a robust technology. We propose to fabricate a moth-eye structure on an optical element. We investigate the machinability on a material such as rexolite and alumina by using the dicing saw and laser machining. We also constructed the measurement setup to evaluate the transmission and polarization properties of a prototype sample. The moth-eye structures on a rexolite show the agreement between the predicted performance and the measurements. We also evaluate the prospect of a moth-eye machining for a larger sample, a diameter of 300~mm.

宇宙微波背景极化的测量可以为探索暴涨范式提供工具。测量的一个关键特点是覆盖了宽带宽和相应的光学系统。传统上，宽带减反射膜是通过在光学元件上涂覆多层膜来实现的。在低温下，多层涂层容易剥落，这一技术从未被确立为可靠的技术。我们建议在光学元件上制作一种蛾眼结构。利用切割机和激光加工机研究了稀土磷灰石和氧化铝等材料的可加工性。我们还建立了测量装置来评估原型样品的传输和偏振特性。锂辉石上的蛾眼结构表明，预测的性能与测量结果一致。我们还评估了对直径300~mm的较大样本进行飞蛾眼加工的前景。

项目成果

Mitigation of the spectral dependent polarization angle response for achromatic half-wave plate

消色差半波片的光谱相关偏振角响应的缓解

• 发表时间: 2014
• 期刊: Applied Optics
• 影响因子: 1.9
• 作者: Atsushi Umeya;Takayuki Myo;Emiko Hiyama;Hiroshi Toki;and Kiyomi Ikeda;T. Matsumura
• 通讯作者: T. Matsumura

Mission Design of LiteBIRD

• DOI: 10.1007/s10909-013-0996-1
• 发表时间: 2013-11
• 期刊: Journal of Low Temperature Physics
• 影响因子: 2
• 作者: T. Matsumura;Y. Akiba;J. Borrill;Y. Chinone;M. Dobbs;H. Fuke;A. Ghribi;M. Hasegawa;K. Hattori-K.-Hatt

Cosmic Microwave Background polarization experiment, POLARBEAR-2. Proceedings of the 12^<th> Asia Pacific Physics Conference

宇宙微波背景偏振实验，POLARBEAR-2。

• 发表时间: 2014
• 期刊: JPS Conf. Proc.
• 作者: T. Myo;A. Umeya;H. Toki;K. Ikeda;Kenji Fukushima;疋田泰章;T. Matsumura,他55人の著者
• 通讯作者: T. Matsumura,他55人の著者

LiteBIRDのHWPと焦点面設計

LiteBIRD HWP 和焦平面设计

• 发表时间: 2013
• 作者: 松村知岳;LiteBIRD working group
• 通讯作者: LiteBIRD working group

Cosmic Microwave Background B-Mode Polarization Experiment POLARBEAR-2

宇宙微波背景 B 模式偏振实验 POLARBEAR-2

• DOI: 10.7566/jpscp.1.013108
• 发表时间: 2014
• 期刊: Proceedings of the 12th Asia Pacific Physics Conference (APPC12)
• 作者: Tomotake Matsumura;Peter Ade;Yoshiki Akiba;Christopher Aleman;Kam Arnold;Matt Atlas;Darcy Barron;Julian Borrill et al.
• 通讯作者: Julian Borrill et al.