天文学进展2025，Vol.43Issue(4)：639-648,10.DOI:10.3969/j.issn.1000-8349.2025.04.08
新一代亚毫米波偏振仪ROGer
New Generation Submillimeter Wave Polarimeter—ROGer
摘要
Abstract
Traditional polarization measurement techniques rely on half-wave plates and wire-grid polarizers but face limitations in suppressing sky noise.The ROGer polarimeter innovatively introduces a modulated polarizing interferometer(MPI)design based on a dual-roof-mirror structure and its application in mitigating sky noise.The MPI structure combines dual roof mirrors and wire-grid polarizers to enable real-time measurement of orthogonal polarization signals with a single detector,significantly enhancing noise suppression capabilities.Mueller matrix analysis demonstrates that the MPI can accurately characterize both polarization signals and noise properties.In preliminary experimental tests,a prototype achieved interference modulation at the 345 GHz band,and the intro-duction of a linear vibration mechanism was discussed,which could achieve modulation frequencies on the order of kilohertz,outperforming traditional rotating half-wave plate solutions.Additionally,as the core module of the ROGer polarimetric camera,the MPI,when combined with an MKID(Microwave Kinetic Inductance Detector)array,exhibits outstanding optical performance and detection efficiency in the Greenland Telescope.The research results indicate that the MPI structure and MKID detector architecture provide an efficient technical solution for high-sensitivity polarization measurements,offering significant application value in the field of submillimeter-wave astronomy.关键词
偏振仪/亚毫米波/磁场/MPI/天空噪声/MKIDKey words
polarimeter/submillimeter wave/magnetic field/MPI/sky noise/MKIDs分类
天文与地球科学引用本文复制引用
LYU Weitao,HUANG Junkun,SUN Jialin,LI Huabai..新一代亚毫米波偏振仪ROGer[J].天文学进展,2025,43(4):639-648,10.基金项目
香港研究资助局项目(CRF C4012-20EF,GRF 14306323,GRF 14307222,GRF14307225) （CRF C4012-20EF,GRF 14306323,GRF 14307222,GRF14307225）
