Cryogenic optical beam steering for superconducting device calibration
arxiv(2024)
摘要
We have developed a calibration system based on a micro-electromechanical
systems (MEMS) mirror that is capable of delivering an optical beam over a
wavelength range of 180 – 2000 nm (0.62 – 6.89 eV) in a sub-Kelvin
environment. This portable, integrated system can steer the beam over a ∼3
cm × 3 cm area on the surface of any sensor with a precision of
∼100 μm, enabling characterization of device response as a function of
position. This fills a critical need in the landscape of calibration tools for
sub-Kelvin devices, including those used for dark matter detection and quantum
computing. These communities have a shared goal of understanding the impact of
ionizing radiation on device performance, which can be pursued with our system.
This paper describes the design of the first-generation calibration system and
the results from successfully testing its performance at room temperature and
20 mK.
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