Fig. 1: Demonstration of the optical information storage using storage phosphors. | Light: Science & Applications

Fig. 1: Demonstration of the optical information storage using storage phosphors.

From: Unlocking the potential of up-conversion charging for rapid and high-resolution optical storage with phosphors

Fig. 1

The left panel illustrates the writing mechanism, encompassing phosphor charging through optical excitation and trap filling. Beyond the conventional charging method via direct photoionization (solid arrow), an alternative approach, up-conversion charging (UCC), which involves two-step ionization (dashed arrows), can also be employed to write information into the phosphor medium. The right panel illustrates the readout mechanism, which operates on the principles of thermal- or photo-stimulated luminescence, involving the release of trapped charges and the subsequent emission from the emitting ion

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