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- Title
Dependence of the profile of a hologram recorded on color centers in a CaF crystal on the type of hologram-forming centers.
- Authors
Shcheulin, A.; Angervaks, A.; Veniaminov, A.; Zakharov, V.; Ryskin, A.
- Abstract
A hologram recorded in a CaF crystal by modulating the concentration of simple centers ( F, M, R, and N) and highly aggregated (mainly colloidal) color centers has been exposed to incoherent 365-nm light to a dose of about 4000 J/cm at a temperature of 80°C. As a result of this exposure, the color centers were almost completely transformed into quasi-colloidal centers. The hologram was retained, and its diffraction efficiency increased; the intensity and number of observed diffraction orders increased as well. Analysis of the angular dependences of the diffraction response made it possible to construct a spatial profile of the hologram, which turned out to be much narrower in comparison with the initial-hologram profile; both profiles differ from a sinusoidal one. The hologram's stability to such a large exposure to incoherent light at an elevated temperature is related to the peculiar diffusion-drift mechanism of hologram recording on color centers in ionic crystals.
- Subjects
HOLOGRAPHY; COLOR centers (Crystals); CALCIUM fluoride; TEMPERATURE effect; IONIC crystals; DIFFUSION; MATHEMATICAL transformations
- Publication
Optics & Spectroscopy, 2012, Vol 113, Issue 6, p638
- ISSN
0030-400X
- Publication type
Article
- DOI
10.1134/S0030400X12120077