Cryogenic optical beam steering for superconducting device calibration

Le résumé fourni par la source

We have developed a calibration system based on a micro-electro-mechanical system mirror that is capable of delivering an optical beam over a wavelength range of 180 to 2000 nm (0.62 to 6.89 eV) in a sub-Kelvin environment. This portable, integrated system is designed to steer the beam over an ∼3cm×3cm∼3cm×3cm area on the surface of any sensor with a precision of ∼100μm∼100μm, enabling the 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. We describe 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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