1985
DOI: 10.1016/0030-4018(85)90265-2
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Efficient unstationary holographic recording in photorefractive crystals under an external alternating electric field

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Cited by 292 publications
(52 citation statements)
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“…The relative dielectric constant ER = 46 and the electro-optic coefficient r 41 = 3.4 pm V-1.' 5 The overall agreement between theory and experiment is good.…”
Section: Istmentioning
confidence: 69%
See 1 more Smart Citation
“…The relative dielectric constant ER = 46 and the electro-optic coefficient r 41 = 3.4 pm V-1.' 5 The overall agreement between theory and experiment is good.…”
Section: Istmentioning
confidence: 69%
“…Experimental results for Bi 12 to the crystal. 5 This ac field increases the photorefractive-index change and preserves the 7r/2 phase shift between the intensity pattern and the induced index grating. The phase shift is responsible for the steady-state energy exchange between two writing beams.…”
mentioning
confidence: 99%
“…L'application d'un champ électrique continu fait migrer les charges de façon dissymétrique ce qui rompt le déphasage de 0 ou n entre le réseau d'illumination et le réseau de champ (i.e de ±n/2 entre le réseau d'illumination et le réseau d'indice). Pour néanmoins conserver ce déphasage on peut songer à appliquer un champ électrique alternatif de période longue devant la constante de temps de recombinaison des charges r K , pour les forcer à migrer, et courte devant la constante de temps photorefractive pour maintenir le déphasage de ±TT/2 entre le réseau d'illumination et le réseau d'indice [61,98,99].…”
Section: Principeunclassified
“…La constante de temps photorefractive étant beaucoup plus courte à champ appliqué nul qu'à fort champ appliqué, le gain photoréfractif chute très rapidement lorsque la fréquence monte. Cette petite explication montre aussi pourquoi un champ électrique de forme sinusoïdale est bien moins efficace qu'un champ électrique de forme créneau [98,99].…”
Section: Principeunclassified
“…However, in the subsequent numerous publications on the DC enhancement, see, e.g., [5][6][7], it was not treated as an SCW effect. The same is valid with respect to the AC enhancement of the PR response [8,9], which is also caused by the presence of weakly damped SCWs and requires application of an alternative electric field. The lack of recognition of the role of SCWs in the enhancement phenomena had no visible negative consequences for practice.…”
Section: Historical Sketchmentioning
confidence: 58%