Abstract
The photorefractivity of a sol-gel glass was investigated using two-beam-coupling (TBC), degenerate-four-wave-mixing (DFWM), and phase shifting methods. The sol-gel glass was prepared by introducing the following photorefractive elements in the polyethyleneglycol matrix: TNF, SG-Cz, and SG-MN were used as charge generator, charge transporter, and electrooptic material, respectively. TBC gain of 90 cm-1 and diffraction efficiency of 46% were obtained at 107 V/μm field. Also we measured the grating build-up and relaxation characteristics. The holographic phase shift was measured to be 51° at 107 V/μm field. In order to compare this photorefractive sol-gel glass with inorganic photorefractive crystal, we measured the photorefractive properties of Fe:LiNbO3. As a result, we obtained the TBC gain of 50 cm-1, the diffraction efficiency of 47%, and the phase shift of 90° for Fe:LiNbO3 sample.
Original language | English |
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Pages (from-to) | 129-135 |
Number of pages | 7 |
Journal | Molecular Crystals and Liquid Crystals |
Volume | 425 |
DOIs | |
Publication status | Published - 2004 |
Externally published | Yes |
Bibliographical note
Funding Information:Keywords: degenerate four wave mixing; holographic phase shift; photorefractivity; sol-gel glass; two beam coupling Received 1 October 2003; accepted 30 January 2004. This work was supported by The KOSEF through the q-Psi at Hanyang University. Dr. C. H. Oh thanks for the financial support from the Basic Research Program of the KOSEF (Grant No. R01-2000-0-000338-0). Address correspondence to C. H. Oh, Department of Physics and Quantum Photonic Science Research Center, Hanyang University, Seoul 133-791, Korea. Tel.: 02-2290-0926, Fax: 02-2297-3802. E-mail: [email protected]
Keywords
- Degenerate four wave mixing
- Holographic phase shift
- Photorefractivity
- Sol-gel glass
- Two beam coupling
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics