Diffraction efficiency enhancement of holographic gratings in Bi_12Ti_076V_024O_20 crystals after recording

Autor:	S. Riehemann, F. Rickermann, Dieter Dirksen, Karsten Buse, G. von Bally
Rok vydání:	1996
Předmět:	Materials science Holographic grating business.industry Photoconductivity Holography Statistical and Nonlinear Physics Photorefractive effect Diffraction efficiency Atomic and Molecular Physics and Optics law.invention Optics law Electric field Optoelectronics Light beam business Phase conjugation
Zdroj:	Journal of the Optical Society of America B. 13:2299
ISSN:	1520-8540 0740-3224
DOI:	10.1364/josab.13.002299
Popis:	An enhancement of the diffraction efficiency of holographic gratings in Bi12Ti0.76V0.24O20 crystals by a factor of almost 40 is obtained after recording by application of an external dc electric field and illumination with a spatially homogeneous light beam. The enhancement increases with increasing applied field, larger spatial frequency, and longer writing time of the holographic grating, and with intensity of the homogeneous illumination. A theoretical description of the enhancement effect is proposed, assuming a modulated photoconductivity, which is generated by a strongly modulated concentration of photorefractive traps or donors.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bdb2a8aeb534963fd0238e0651a62b0e https://doi.org/10.1364/josab.13.002299 Zobrazit plný text záznamu