Regulated polarization degree of upconversion luminescence and multiple anti-counterfeit applications  

作　　者：Dong-Ping Wen Ping Chen Yi Liang Xiao-Ming Mo Cao-Feng Pan 

机构地区：[1]Center On Nanoenergy Research,Guangxi Key Laboratory for Relativistic Astrophysics,School of Physical Science and Technology,Guangxi University,Nanning 530004,China [2]Key Laboratory of Micronano Energy and Sensor,CAS Center for Excellence in Nanoscience,Beijing Institute of Nanoenergy and Nanosystems,Chinese Academy of Sciences,Beijing 100140,China

出　　处：《Rare Metals》2024年第5期2172-2183,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.11704081,52125205,52250398,U20A20166,52192614 and 52003101);Guangxi Natural Science Foundation(Nos.2020GXNSFAA297182,2020GXNSFAA297041 and 2017GXNSFBA19-8229);the special fund for Guangxi Bagui Scholars;National Science and Technology Innovation Talent Cultivation Program(No.2023BZRC016);National Key R&D Program of China(Nos.2021YFB3200302 and2021YFB3200304);the Natural Science Foundation of Beijing Municipality(No.2222088);Shenzhen Science and Technology Innovation Program(No.KQTD20170810105439418);the Fundamental Research Funds for the Central Universities。

摘　　要：Polarization upconversion luminescence(PUCL)of lanthanide ions(Ln^(3+))has been widely used in single particle tracking,microfluidics detection,three-dimensional displays,and so on.However,no effective strategy has been developed for modulating PUCL.Here we report a strategy to regulate PUCL in Ho^(3+)-doped NaYF4single nanorods based on the number of upconversion photons.By constructing a multiphoton upconversion system for Ho^(3+),we regulate the degree of polarization(DOP)of PUCL from 0.590 for two-photon luminescence to 0.929 for three-photon upconversion luminescence(UCL).Furthermore,our strategy is verified from cross-relaxation between Ho^(3+)and Yb^(3+),excitation wavelength,excitation power density,and local site symmetry.And this regulation strategy of PUCL has also been achieved in Tm^(3+),with the DOP ranging from 0.233 for two-photon luminescence to 0.925 for four-photon UCL Besides,multi-dimensional anti-counterfeiting display has been explored with PUCL.This work provides an effective strategy for regulating PUCL and also provides more opportunities for the development of polarization display optical encoding,anti-counterfeiting,and integrated optical devices.

关 键 词：Polarization upconversion luminescence Degree of polarization Population density of excited state Number of upconversion photons Polarization anti-counterfeitingdisplay 

分 类 号：TB481[一般工业技术—包装工程] O469[理学—凝聚态物理]