대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 1994년도 추계학술대회 논문집 학회본부
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- Pages.379-381
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- 1994
광굴절 결정에서의 홀로그램 Fixing에 관한 연구
Hologram Fixing in Photorefractive Crystal
- Hwang, Seong-Mo (Dept. of Electrical Engineering, Seoul National Univ.) ;
- Lee, Hyuk (Dept. of Electrical Engineering, Seoul National Univ.)
- 발행 : 1994.11.18
초록
Volume holograms recorded in photorefractive materials can find important applications in optical memories and optical computing systems. One problem with a photorefractive hologram is that it gets erased by the readout light. Nondestructive readout can be achieved by hologram fixing, and several fixing methods have been reported. Fixing is accomplished by thermally activated motion of an unknown ionic defect, which neutralizes the electronic space-charge patterns. At room temperature the ionic patterns are stabilized. When the electrons are partially redistributed by light, a net space-charge pattern appears, and tile fixed hologram can be read out. In this paper, theoretical modeling and some experimental results are presented for thermal fixing of volume phase holograms in photorefractive
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