Design of Readout and Characterization System for Multi-pixel Superconducting Terahertz MKIDs

Abstract The proposed design of a microwave superconducting kinetic inductance detector (MKID) array readout system characterizes the performance of MKIDs through a digital homodyne frequency mixing architecture. Meanwhile, the readout system is implemented using a frequency division multiplexing circuit system, coupled with an FFT design to enable the readout of MKID arrays. The system is characterized by its compact size, low cost, portability, and ease of further development. Together, these features have significant implications for the design and readout of terahertz MKID arrays, while simultaneously advancing both the theoretical and practical aspects of MKID technology.