Share Email Print
cover

Proceedings Paper

Nonvolatile and quasi-nonvolatile holographic recording in near-stoichiometric lithium niobate doubly doped with Tb and Fe
Author(s): Myeongkyu Lee; Shunji Takekawa; Yasunori Furukawa; Kenji Kitamura
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We observed that newly developed near-stoichiometric LiNbO3 crystals doubly doped with Tb and Fe have three different types of energy levels: UV absorption centers just above the valence band, metastable shallow electron traps slightly below the conduction band, the deep traps located about 1.9 eV below the conduction band. Irradiation with UV light induced a stable absorption band extending from (lambda) equals 650 nm to the absorption edge, which is caused by the photoinduced charge transfer from UV-sensitive absorption centers to deep traps via the conduction band. The electron lifetimes at shallow and deep traps could be controlled by doping concentrations. Based on these favorable energy states, nonvolatile two-color holographic recording has been demonstrated by use of 852-nm recording beams and UV gating light. Quasi-nonvolatile one-color recording at 532 nm has also been demonstrated in these codoped crystals. Hologram recording from the UV-exposed, colored state revealed a much improved sensitivity in comparison to that from the uncolored state.

Paper Details

Date Published: 4 June 2001
PDF: 7 pages
Proc. SPIE 4296, Practical Holography XV and Holographic Materials VII, (4 June 2001); doi: 10.1117/12.429463
Show Author Affiliations
Myeongkyu Lee, National Institute for Research in Inorganic Materials (Japan)
Shunji Takekawa, National Institute for Research in Inorganic Materials (Japan)
Yasunori Furukawa, National Institute for Research in Inorganic Materials (Japan)
Kenji Kitamura, National Institute for Research in Inorganic Materials (Japan)


Published in SPIE Proceedings Vol. 4296:
Practical Holography XV and Holographic Materials VII
Stephen A. Benton; Sylvia H. Stevenson; T. John Trout; Sylvia H. Stevenson; T. John Trout, Editor(s)

© SPIE. Terms of Use
Back to Top