用于UV全息和数字存储的有机材料

P. Ramanujam, B. Lohse, R. Berg
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引用次数: 3

摘要

我们证明了附着在短烷基链上的光二聚化发色团作为高容量数字光存储的潜在介质的可能性。在1-(6-溴己基)尿嘧啶薄膜中,用5mw无聚焦激光束照射257 nm,在20 s内透射率从4%增加到70%。通过理论模拟,我们发现在光子剂量为9 1016光子cm-2 s-1时,相互作用截面为6 10-18 cm2。我们还研究了在薄膜中形成全息衍射光栅,获得了16%的效率,主要是由于表面浮雕光栅。
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Organic materials for UV holographic and digital storage
We demonstrate the possibility of photodimerizable chromophores attached to a short alkyl chain as a potential medium for high capacity digital optical storage. A large increase in transmission from 4% to 70% is obtained in 20 s when irradiated with a 5 mW unfocused laser beam at 257 nm in a thin film of 1-(6-Bromohexyl)uracil. Through theoretical simulations, we show that the interaction cross-section is 6 10-18 cm2 at a photon dose of 9 1016 photons cm-2 s-1. We also investigate the formation of holographic diffraction grating in a film, obtaining an efficiency of 16%, mainly due to a surface relief grating.
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