![]() Compared to the traditional magnetic storage and semiconductor memory, optical information storage exhibits the advantages of higher efficiency, lower energy consumption, longer storage life, and larger capacity, and thus it is widely considered as an important storage strategy for the next generation 1, 2. Recently years, researchers have focused on exploring innovative information storage devices and information storage strategies. This work enables multi-dimensional storage of information and provides new insights into the design and fabrication of next-generation storage materials.Ĭurrently, human society has entered the information age, in which our daily lives are being inundated by a huge amount of data. Based on the advantage of multiple tunable luminescence, the nanocomposites are designed as optical modules to load optical information. Moreover, the time-gating technology is used to filter the upconversion emission of a long lifetime from Tb 3+ or Eu 3+, and the possibilities for modulating the emission color of the nanocomposites are further expanded. Meanwhile, the nanocomposites show different colors under 980 nm laser excitation when the content of Tb 3+ ions is changed in the upconversion nanoparticles. The nanocomposite can emit blue and white light under 365 and 394 nm excitation, respectively. Here, we report a multimodal nanocomposite composed of lanthanide-doped upconverting nanoparticle and EuSe semiconductor, which was constructed by utilizing a cation exchange strategy. Recently, luminescent lanthanide-doped nanomaterials have drawn much attention in this field because of their photostability, multimodal/multicolor/narrowband emissions, and long luminescence lifetime. The continuously growing importance of information storage, transmission, and authentication impose many new demands and challenges for modern nano-photonic materials and information storage technologies, both in security and storage capacity.
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