Trivalent rare-earth (RE)-doped upconversion photoluminescence (UCPL) materials are promising in solar cell, anti-fake printing, and displays. However, the intensity of UCPL is often not high enough for practical applications, because of very weak absorption cross-section at the pump wavelength due to the parity forbidden intra-4f shell transitions of RE ions. One promising approach for the enhancement of UCPL efficiency is exploiting the coupling of RE-doped upconverters with surface plasmon resonance of a metal nanostructure. In this paper, we report lithographically fabricated two-dimensional square lattice of Al nanocylinders combined with nanoparticles layer of CaF2 codoped with Er3+,Yb3+ that shows enhanced UCPL. We systematically vary the periodicity of the lattice and examine the UCPL enhancement. The maximum UCPL enhancement is observed at a period of 750 nm, showing 22 and 13.3-fold enhancements for green and red emission branches, respectively. Moreover, we observe enhancement of downconversion emission at 1540 nm. A comparison between the experiment and simulation suggests that enlarged light absorption at the pump wavelength is a dominant factor for UCPL and downconversion enhancements.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.