Storing Movies in Atomic Vapor (IMAGE)
Caption
This is a gradient echo memory setup. The image to be stored, the letter N encoded by a signal laser beam and a mask, enters from the left (pink light) and enters the storage cell filled with Rb atoms. The components of this image will be absorbed by the atoms when, at locations all over the body of the cell, a part of the signal beam and parts of a separate “control” laser beam -- entering from the side (shaded green) via a polarizing beam splitter (PBS) -- and (last but not least) the strength of a magnetic field (delivered by the brown coil around the cell) are just right. The stored image can later be read out and observed with a CCD camera.
Credit
NIST
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