| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9785986 | Optics Communications | 2005 | 8 Pages |
Abstract
We have observed ultraviolet-induced visible absorption and performed two-color holographic recording at green, red, and near-infrared light in thulium doped near-stoichiometric LiNbO3 crystal. The diffraction efficiency and sensitivity of the recording process at all wavelengths are increased by ultraviolet gating light. Characteristics of recording in the visible are explained by a two-center model. Two-color recording in the near-infrared exhibits significant improvements of the fixed diffraction efficiency and the role of small polarons is discussed in the visible and near-infrared recording with ultraviolet sensitizing light.
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Materials Science
Electronic, Optical and Magnetic Materials
Authors
Van-Thai Pham, Sun-Kyun Lee, Minh-Tuan Trinh, Ki-Soo Lim, D.S. Hamilton, K. Polgár,