Remarkable Enhancement of Upconversion Luminescence on Cap-Ag/PMMA Ordered Platform and Trademark Anticounterfeiting
Source abstract
Abstract
High brightness of upconversion luminescence (UCL) for a thinner layer of UC nanoparticles is significant for routine applications of effective trademark anticounterfeiting technology. In this work, efficient UCL of NaYF 4:Yb 3+,Er 3+ /Tm 3+ was realized by combining a Ta 2 O 5 dielectric layer on the cyclical island silver films supported by poly(methyl methacrylate) opal photonic crystals (PCs). The synergistic modulation of localized surface plasmon resonance and PC effect results in a significant improvement of the local electromagnetic field and an optimum UC enhancement of 145 folds. Furthermore, colorful pattern nanoprinting has been applied to this composite and used for trademark anticounterfeiting. The combination of angle-dependent PC effect and infrared-to-visible UCL represents a more advanced anticounterfeiting technique.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Photonic Crystals and Applications · Random lasers and scattering media · Liquid Crystal Research Advancements
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, and ‡College of Physics, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
Funding
Natural Science Foundation of Jilin Province · Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Challenge Cup Fund, Jilin University
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