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Abstract
We grew a set of indium and molybdenum co-doped lithium niobate crystals with various indium doping concentrations and investigated their photorefractive properties at different wavelengths (442, 488 and 532 nm). It was found that the diffraction efficiency of 1.0 mol% indium and 0.5 mol% molybdenum co-doped lithium niobate crystal could reach 61.57% at 488 nm. Moreover for 3.0 mol% indium and 0.5 mol% molybdenum co-doped lithium niobate crystal, the response time was greatly shortened to 0.61, 0.76, and 0.74 s at 442, 488, and 532 nm, respectively, while the photorefractive sensitivity reached as high as 7.35 cm/J at 442 nm. These results indicate that co-doping of indium is an efficient way to further enhance the photorefractive properties of molybdenum-doped lithium niobate crystal.
Highlights
Holographic storage, first investigated in the late 1960s and early 1970s, is considered to be the preferred option for the new generation of storage.[1,2] Compared with conventional storage, photorefractive holographic storage has the advantages of a smaller volume, greater storage capacity, and higher data transfer rates etc
The saturated diffraction efficiency ηs and the response time τr were obtained by the fitting of the function ηt = ηs(1 − e−t/τr )[2]
Our results indicate that In3+ co-doping can enhance the photorefractive properties of LN:Mo crystals
Summary
Holographic storage, first investigated in the late 1960s and early 1970s, is considered to be the preferred option for the new generation of storage.[1,2] Compared with conventional storage, photorefractive holographic storage has the advantages of a smaller volume, greater storage capacity, and higher data transfer rates etc. Great progress has been made in holographic storage.[3,4,5,6,7] the lack of a suitable recording material has impeded its practical application and commercialization.[8] Lithium niobate (LiNbO3, LN) crystals have received much interest due to its potential for parallel processing, content addressability and low cost They are considered to be one of the most competitive candidates for holographic storage applications. The long response time and low sensitivity are still considered as the main obstacles for application of LN crystal in realization of rapid information recording and reconstruction
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