Cross-polarization reduction in kinetic inductance detectors based on quasi-lumped resonators
Kinetic inductance detectors (KIDs) have emerged as a leading technology for millimeter- and submillimeter-wave astronomy due to their high sensitivity, natural multiplexing capabilities, and scalable fabrication. In polarization-sensitive applications -such as cosmic microwave background (CMB) stud...
| Authors: | , , , , , , , , , |
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| Format: | article |
| Publication Date: | 2026 |
| Country: | España |
| Institution: | Universidad de Cantabria (UC) |
| Repository: | UCrea Repositorio Abierto de la Universidad de Cantabria |
| Language: | English |
| OAI Identifier: | oai:dnet:ucreareposit::6a583775a0d8f7a7647fc9414f4baac6 |
| Online Access: | https://hdl.handle.net/10902/40390 |
| Access Level: | Open access |
| Keyword: | Cross-polarization Distributed resonators Kinetic inductance detector (KID) Lumped-element resonator (LER) Millimeter-wave astronomy Polarimeter Superconducting microwave devices |
| Summary: | Kinetic inductance detectors (KIDs) have emerged as a leading technology for millimeter- and submillimeter-wave astronomy due to their high sensitivity, natural multiplexing capabilities, and scalable fabrication. In polarization-sensitive applications -such as cosmic microwave background (CMB) studies - cross-polarization, or unintended response to the orthogonal polarization, poses a significant limitation to measurement fidelity. This work investigates the origin of cross-polarization in meandered lumped-element KIDs (LEKIDs), with particular emphasis on the role of parasitic currents in the interdigitated capacitor. A comparative study between conventional LEKIDs and a quasi-lumped resonator design is presented, demonstrating that removing the capacitive element may improve cross-polarization discrimination, confirming the capacitor´s contribution to polarization leakage. |
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