| Popis: |
Electroholography (EH) is a generic concept in optoelectronics, which enables to govern the reconstruction process of volume holograms by an external electric field. EH is based on the use of the voltage controlled photorefractive (PR) effect in crystals at the paraelectric phase(1). The PR effect enables the recording of volume holograms in a crystal, by spatially modulating its index of refraction in response to light energy it absorbs. In crystals at the paraelectric phase the PR effect is voltage controlled, namely, one can control the efficiency of the effect by applying an external electric field to the crystals during the reading (reconstructing) stage. |
