Dependence of the profile of a hologram recorded on color centers in a CaF2 crystal on the type of hologram-forming centers
- 54 Downloads
A hologram recorded in a CaF2 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/cm2 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.
KeywordsColor Center Diffraction Efficiency Refractive Index Profile Hologram Recording Incoherent Light
Unable to display preview. Download preview PDF.
- 2.V. M. Belous, V. E. Mandel’, A. Yu. Popov, and A. V. Tyurin, Opt. Spektrosk. 87(2), 327 (1999) Opt. Spectrosc. 87 (2), 305 (1999).Google Scholar
- 5.Crystals with the Fluorite Structure, Ed. by W. Hayes (Clarendon Press, Oxford, 1974).Google Scholar
- 8.C. Z. van Doorn, Philips Res. Rep., Suppl., No. 4, 1 (1962).Google Scholar
- 11.A. Yu. Popov, A. V. Tyurin, and D. A. Vladimirov, Vestn. Cherkasskogo Univ., Ser. Fiz. -Mat. Nauki, No. 53, 122 (2003).Google Scholar
- 13.A. S. Shcheulin, Extended Abstract of Doctoral Dissertation (St. Petersburg, 2008).Google Scholar