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arXiv · 2501.03827

Demonstration of Ultra-Sensitive KIDs for Future THz Space Borne Polarimeters

Stephen J. C. Yates·Alejandro Pascual Laguna·Willem Jellema·Edgar Castillo-Dominguez·Lorenza Ferrari·Bram Lap·Vignesh Murugesan·Jose R. G. Silva·David Thoen·Ian Veenendaal·Jochem J. A. Baselmans
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Abstract

We present measurements and simulations of the polarization purity of leaky lens-antenna coupled microwave Kinetic Inductance Detectors (KIDs) at 1.5 THz. We find the integrated cross-polarization level to be at -21.5 dB for 1 f\#$\lambda$ spatial sampling. The measurements agree well with the theoretical description which is based on a combination of in-transmission simulation of the antenna feed, and an in-reception analysis of the antenna-KID system. Combined with the measured noise equivalent power of 5--7$\times$10$^{-20}$ W/$\sqrt{\mathrm{Hz}}$, these detectors are excellent candidates for large scale and high performance imaging polarimetric instruments.

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Stephen J. C. Yates, Alejandro Pascual Laguna, Willem Jellema, Edgar Castillo-Dominguez, Lorenza Ferrari, Bram Lap, Vignesh Murugesan, Jose R. G. Silva, David Thoen, Ian Veenendaal, Jochem J. A. Baselmans. 2025-01-07. Demonstration of Ultra-Sensitive KIDs for Future THz Space Borne Polarimeters. https://doi.org/10.1109/tthz.2025.3566218

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