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We demonstrate a simple technique for microwave field imaging using alkaliatoms in a vapor cell. The microwave field to be measured drives Rabioscillations on atomic hyperfine transitions, which are detected in a spatiallyresolved way using a laser beam and a camera. Our vapor cell geometry enablessingle-shot recording of two-dimensional microwave field images with 350 {\mu}mspatial resolution. Using microfabricated vapor cell arrays, a resolution of afew micrometers seems feasible. All vector components of the microwave magneticfield can be imaged. Our apparatus is simple and compact and does not requirecryogenics or ultra-high vacuum.

Simple microwave field imaging technique using hot atomic vapor cells