Nondestructive Up-Conversion Readout in Er/Yb Co-Doped Na0.5Bi2.5Nb2O9-Based Optical Storage Materials for Optical Data Storage Device Applications
Nondestructive Up-Conversion Readout in Er/Yb Co-Doped Na0.5Bi2.5Nb2O9-Based Optical Storage Materials for Optical Data Storage Device Applications
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用于光数据存储器件应用的 Er/Yb 共掺杂 Na0.5Bi2.5Nb2O9 基光存储材料的无损上转换读出
DOI：
10.1039/c7tc00582b
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Shengli An
中科院分区：
文献类型：
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作者：
Qiwei Zhang;Shuangshuang Yue;Haiqin Sun;Xusheng Wang;Xihong Hao;Shengli An
基于光致变色反应的发光调制一直被认为是实现光致变色材料非破坏性读出的一种很有前途的方法。一般来说，两种传统的策略已被广泛用于实现这一目标：调谐吸收带和调节发光猝灭机制。本文提出了一种利用发光中心的双光子吸收模式来有效提高Er/Yb共掺NbN基固态无机光致变色器件发光读出能力的新策略。在交替可见光照射（407 nm）和热刺激下，材料表现出高的发光切换对比度（Δ R-t = 86%）、优异的可逆性和显著提高的发光效率（22倍）。最重要的是，光致变色反应过程可以使用双光子吸收（或上转换）模式有效地读出，而不会引起任何新的反应，对信息记录的破坏极低（破坏程度<11%），这上级其他发光发射模式（下移位或下转换）。这些结果可以作为指导，以定制的光致变色材料的发光调制特性，以实现非破坏性读出的3D光学数据存储设备的应用。
Luminescence modulation based on photochromic reactions is always considered to be a promising method to achieve nondestructive readout in photochromic materials. Generally speaking, two conventional strategies have been widely used to achieve this target: tuning the absorption bands and adjusting luminescent quenching mechanisms. In this paper, we found a new strategy to improve effectively luminescence readout capability in Er/Yb codoped NBN-based solid-state inorganic photochromics by using a two-photon absorption mode of luminescent centers. Upon alternating visible light irradiation (407 nm) and the thermal stimulus, the materials exhibited a high luminescence switching contrast ratio (Delta R-t = 86%), excellent reversibility, and significantly improved luminescent efficiency (22 times). Most importantly, the photochromic reaction process can be efficiently read out using the two-photon absorption (or up-conversion) mode without inducing any new reactions, showing extremely low destruction on information recording (destruction degree <11%), which is superior to other luminescence emission modes (down-shifting or down-conversion). These results could be used as a guide to tailor the luminescence modulation properties of photochromic materials to realize non-destructive readout in 3D optical data storage device applications.