Cross-Polarization Reduction in Kinetic Inductance Detectors Based on Quasi-Lumped Resonators
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866915530751868928 |
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| author | Rollano, Victor Calvo, Martino Laguna, Alejandro Pascual Rodriguez, David Magaz, Maria Teresa Aja, Beatriz de la Fuente, Luisa Granados, Daniel Monfardini, Alessandro Gomez, Alicia |
| author_facet | Rollano, Victor Calvo, Martino Laguna, Alejandro Pascual Rodriguez, David Magaz, Maria Teresa Aja, Beatriz de la Fuente, Luisa Granados, Daniel Monfardini, Alessandro Gomez, Alicia |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_01882 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Cross-Polarization Reduction in Kinetic Inductance Detectors Based on Quasi-Lumped Resonators Rollano, Victor Calvo, Martino Laguna, Alejandro Pascual Rodriguez, David Magaz, Maria Teresa Aja, Beatriz de la Fuente, Luisa Granados, Daniel Monfardini, Alessandro Gomez, Alicia Instrumentation and Methods for Astrophysics Instrumentation and Detectors 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. |
| title | Cross-Polarization Reduction in Kinetic Inductance Detectors Based on Quasi-Lumped Resonators |
| topic | Instrumentation and Methods for Astrophysics Instrumentation and Detectors |
| url | https://arxiv.org/abs/2510.01882 |