CdF2:In: A novel material for optically written storage of information
- 3 July 1995
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 67 (1) , 31-33
- https://doi.org/10.1063/1.115482
Abstract
We demonstrate that semiconducting CdF2 crystals doped with indium is an efficient medium for optical storage of information in static and dynamic regimes. A metastable phototransformation of 1018 cm−3 In centers from a localized deep state to a hydrogenlike shallow state leads to a change of the refractive index Δn of about 10−4 for the probe beam at the wavelength of 500 nm. The diffraction efficiency is temperature dependent due to spontaneous decay of the grating caused by thermal recovery of the In impurity from the metastable hydrogenic state to the localized ground state.Keywords
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