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

doi:10.1109/TTHZ.2025.3566218

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

Instrumentation and Methods for Astrophysics 2025-08-12 v2

Authors: 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.

Keywords

Kinetic Inductance Detectors polarization purity leaky lens-antenna microwave noise equivalent power THz space-borne polarimeter cross-polarization

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@article{arxiv.2501.03827,
  title  = {Demonstration of Ultra-Sensitive KIDs for Future THz Space Borne Polarimeters},
  author = {Stephen J. C. Yates and Alejandro Pascual Laguna and Willem Jellema and Edgar Castillo-Dominguez and Lorenza Ferrari and Bram Lap and Vignesh Murugesan and Jose R. G. Silva and David Thoen and Ian Veenendaal and Jochem J. A. Baselmans},
  journal= {arXiv preprint arXiv:2501.03827},
  year   = {2025}
}

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

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