| 摘要 |
Photorefractive cell comprising: - an electrooptic material (1) - a first and a second material (4, 5) between which the electrooptic material is interposed. This first material (4) and this second material (5) are quantum wells separated from the electrooptic material by materials forming quantum barriers, the conduction and valence energy bands of these materials being such that, in the absence of an external electric field, the holes and electrons photoexcited by the write radiation in the electrooptic layer pass respectively into the first (4) and the second (5) materials by tunnel effect. <IMAGE> |
