Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Multi-wavelength pumped upconversion enhancement induced by Cu2-xS plasmonic nanoparticles in NaYF4@Cu2-xS core–shell structure

Not Accessible

Your library or personal account may give you access

Abstract

${{\rm Cu}_{2 - x}}{\rm S}$ nanoparticles (NPs) demonstrate unique tunable localized surface plasmon resonance (LSPR) and nonlinear optical properties, which are promising materials for photoelectric and display devices. In this work, we present highly improved upconversion luminescence (UCL) in the ${{\rm NaYF}_4}{:}{{\rm Yb}^{3 +}}$, ${{\rm Er}^{3 + \;}}@{{\rm NaYF}_{4}}{:}{{\rm Yb}^{{3 +}}}$, ${{\rm Nd}^{3 +}}$ $@{{\rm Cu}_{{2 - x}}}{\rm S}$ core–shell structure. The UCL enhancement is systemically studied under excitation of multi-wavelengths 808, 980, and 1540 nm, due to the broadband nature of ${{\rm Cu}_{2 - x}}{\rm S}$ LSPR. Two different mechanisms synergistically contribute to the UCL enhancement, namely, the LSPR effect and two-photon effect, which lead to the extraordinary power dependence of UCL. UCL enhancement as high as 12-fold is achieved in the core–shell upconversion NPs (UCNPs). The core–shell NPs are printed on a paper substrate using a nano-printing technique, displaying different colors irradiated by different near-infrared light, and have potential applications in anti-counterfeiting, encryption, and display fields. These findings provide a method to design and optimize luminescent materials and demonstrate potential applications of plasmonic semiconductors and UCNPs.

© 2020 Optical Society of America

Full Article  |  PDF Article
More Like This
Enhanced upconversion emission in colloidal (NaYF4:Er3+)/NaYF4  core/shell nanoparticles excited at 1523 nm

Wei Shao, Guanying Chen, Jossana Damasco, Xianliang Wang, Aliaksandr Kachynski, Tymish Y. Ohulchanskyy, Chunhui Yang, Hans Ågren, and Paras N. Prasad
Opt. Lett. 39(6) 1386-1389 (2014)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved