定比LN・LTにおけるフォトクロミズムとホログラムへの応用 : バルク成長IV

概要

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We have observed that newly developed Tb-doped near-stoichiometric LiNbO_3 and LiTaO_3 crystals exhibit considerably strong photo-induced absorption. They have, at least, three different types of energy levels: ultraviolet (UV) absorption centers just above the valence band, metastable shallow electron traps slightly below the conduction band, and deep traps about 1.9 eV below the conduction band. Based on these energy levels, two-color nonvolatile and one color quasi-nonvolatile holographic recording has been demonstrated.
日本結晶成長学会の論文
2000-07-01