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Laser-based frequency-to-pixel mapping method for submillimetre MKID array
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DOI：10.1093/rasti/rzag007.png)
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Abstract
En 中文
Microwave Kinetic Inductance Detectors (MKIDs) leverage their intrinsic frequency-division multiplexing capabilities to facilitate full-array readout via a single transmission line, thereby offering exceptional scalability for large-format submillimetre (sub-mm) detectors. However, fabrication variations lead to frequency shifts, collisions, and missing resonators, requiring precise frequency mapping for every pixel in these architectures. We present a visible line-laser scanning method that sequentially illuminates array rows and columns with a narrow linear footprint, producing localized quasi-particle generation ($h\nu \gg 2\Delta$) and measurable resonance shifts for direct frequency-to-pixel assignment. As demonstrated by our 157-pixel ROGer polarimeter array, this method accurately establishes the frequency-to-pixel mapping while maintaining the intrinsic MKIDs architecture without necessitating modifications to the focal-plane architecture. This scalable, alignment-friendly approach provides a promising approach to addressing the challenges of large-array MKIDs for next-generation sub-mm instruments.
Keywords:
MKIDs
Frequency-division multiplexing
Frequency-to-pixel mapping
Visible line laser mapping
Sub-mm astronomy
Instrumentation
Journal
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34
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