We report on the status of an ongoing effort to develop arrays of horn-coupled, polarization-sensitive microwave kinetic inductance detectors (MKIDs) that are each sensitive to two spectral bands between 125 and 280 GHz. These multi-chroic MKID arrays are tailored for next-generation, large-detector-count experiments that are being designed to simultaneously characterize the polarization properties of both the cosmic microwave background (CMB) and Galactic dust emission. We present our device design and describe laboratory-based measurement results from two 23-element prototype arrays. From dark measurements of our first engineering array we demonstrated a multiplexing factor of 92, showed the resonators respond to bath temperature changes as expected, and found that the fabrication yield was 100%. From our first optically loaded array we found the MKIDs respond to millimeter-wave pulses, additional optical characterization measurements are ongoing. We end by discussing our plans for scaling up this technology to kilo-pixel arrays over the next two years.
@article{arxiv.1711.02523,
title = {Development of Multi-Chroic MKIDs for Next-Generation CMB Polarization Studies},
author = {B. R. Johnson and D. Flanigan and M. H. Abitbol and P. A. R. Ade and S. Bryan and H. -M. Cho and R. Datta and P. Day and S. Doyle and K. Irwin and G. Jones and D. Li and P. Mauskopf and H. McCarrick and J. McMahon and A. Miller and G. Pisano and Y. Song and H. Surdi and C. Tucker},
journal= {arXiv preprint arXiv:1711.02523},
year = {2018}
}
Comments
LTD-17 paper accepted by Journal of Low Temperature Physics