Observation of holographic focusing effects in a carbazole photorefractive film without a bias field

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2008,（23）
• 页码范围: 3773-3776
• 页数: 4页
• 语种: 英文
• DOI: 10.1007/s11434-008-0519-7

摘要

The holographic focusing effects of light in a carbazole photorefractive film at 632.8 nm wavelength were observed without applying a bias field, owing to the two-beam coupling process in the material.The material was prepared from the mixture of 3-formyl-N-vinylcarbazole (99 wt%) and 2,4,7-trinitro-9-fluorenone (1 wt%).