Diffraction efficiency enhancement of holographic gratings in Bi12Ti0.76V0.24O20 crystals after recording

Autor(en): Rickermann, F
Riehemann, S
Buse, K
Dirksen, D
vonBally, G
Stichwörter: BI12SIO20; BI12TIO20 CRYSTALS; CENTERS; CHARGE-TRANSPORT; ELECTRON-HOLE TRANSPORT; MEDIA; Optics; PHOTOREFRACTIVE CRYSTALS
Erscheinungsdatum: 1996
Herausgeber: OPTICAL SOC AMER
Journal: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volumen: 13
Ausgabe: 10
Startseite: 2299
Seitenende: 2305
Zusammenfassung: 
An enhancement of the diffraction efficiency of holographic gratings in Bi(12)Ti(0.76)V(0.24)0(20) crystals by a factor of almost 40 is obtained after recording by application of an external de 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. (C) 1996 Optical Society of America.
Beschreibung: 
5th Topical Meeting on Photorefractive Materials, Effects, and Devices, ESTES PK, CO, JUN, 1995
ISSN: 07403224
DOI: 10.1364/JOSAB.13.002299

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