| Revista: | Superficies y vacío |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000404718 |
| ISSN: | 1665-3521 |
| Autors: | Alvarez, E1 Sosa, R2 Muñoz, A2 Foldvari, I3 Polgar, K3 Peter, A3 |
| Institucions: | 1Universidad de Sonora, Departamento de Física, Hermosillo, Sonora. México 2Universidad Autónoma Metropolitana, Departamento de Física, Iztapalapa, Distrito Federal. México 3Research Institute for Solid State Physics and Optics, Budapest. Hungría |
| Any: | 2004 |
| Període: | Dic |
| Volum: | 17 |
| Número: | 4 |
| Paginació: | 15-16 |
| País: | México |
| Idioma: | Inglés |
| Tipo de documento: | Artículo |
| Enfoque: | Analítico |
| Resumen en inglés | Litihum Niobate (LiNbO3) is a paradigmatic photorefractive material. It provided the first experimental evidence of the photorefractive effect and still maintains a key position in the field. It has been extensively investigated as holographic media. One of the most important problems in the holographic information storage is that of fixing the information. A promising technique is to use two-color holography in which charge generation occurs by means of a two-step photoionization with two-color light. Several research groups have recently demonstrated the bipolaronbased two color recording in undoped and doped LiNbO3 with UV, blue and green gating lights. Moreover, nonvolatile recording has been reported in LiNbO3:Er3+ and LiNbO3:Tb3+ under uncoherent light exposition to UV and blue-green light. However, the role of the Tb and Er ions in the photorefractive process has not been completely understood. Due to the importance of provide spectroscopic information on the optical properties of these materials, in order to lead to better device performance, the aim of this letter is to present the results of an experimental study on the effects of the Er and Tb on the optical properties of LiNbO3. Evidence of spectral dips appearing in the blue intrinsic emission of the host LiNbO3 to support the identification of an active host-ion radiative energy transfer mechanism in our single crystal samples |
| Disciplines | Física y astronomía, Ingeniería |
| Paraules clau: | Física de materia condensada, Ingeniería de materiales, Niobio, Litio, Oxígeno, Espectroscopía |
| Keyword: | Physics and astronomy, Engineering, Condensed matter physics, Materials engineering, Niobium, Lithium, Oxygen, Spectroscopy |
| Text complet: | Texto completo (Ver PDF) |
