Abstract
Illumination of oxidized iron-doped crystals with visible or ultraviolet light yields absorption changes of as much as that are stable at room temperature. These photochromic effects cannot be erased by light, but heating the crystal to a moderate temperature (100 °C) can switch it back to its initial state. These effects, in particular the optical irreversibility, might be of interest, e.g., for optical control of charge-transport properties and for persistent data storage.
© 1999 Optical Society of America
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