Open AccessBackward optical gain originating from weak localization strengthened three-photon process in Er/Yb co-doped (Pb,La)(Zr,Ti)O_3 ceramics
Author(s) -
Caixia Xu,
Jingwen Zhang,
Yu Zou,
Hua Zhao
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.005744
Subject(s) - materials science , optics , wavelength , doping , laser , ceramic , green light , green laser , optoelectronics , photon , visible spectrum , blue light , physics , composite material
The enhancement of green upconverted emission from the Er 3+ /Yb 3+ co-doped (Pb,La)(Zr,Ti)O 3 ceramic powder under a pumping light with a wavelength of 1480 nm was observed to be greater than 30 times that from the bulk of the same sample. Weak localization of light supported by the spatial profile of scattered light facilitated the three-photon process contributing to stronger green upconverted emission. Significant backward light amplification was also observed and studied in detail. Additionally, the distribution of the localization zones in the sample was investigated using a probing laser beam with a wavelength of 532 nm. The findings in this work could be used in improving the solar cell efficiency, modulating color, and designing smart devices.