Open AccessInfrared to visible upconversion of Nd3+ions in KPb2Br5low phonon crystal
Author(s) -
Rolindes Balda,
J. Fernández,
Ei Ei Nyein,
U. Hömmerich
Publication year - 2006
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.14.003993
Subject(s) - photon upconversion , excited state , materials science , infrared , spectroscopy , excitation , ion , phonon , crystal (programming language) , luminescence , optics , atomic physics , optoelectronics , analytical chemistry (journal) , chemistry , physics , quantum mechanics , computer science , programming language , condensed matter physics , organic chemistry , chromatography
In this work we present a detailed analysis of the infrared to visible upconversion in Nd(3+)-doped KPb(2)Br(5) low phonon crystal by using both steady-state and time-resolved luminescence spectroscopy. Efficient blue, green, orange, and red emissions have been observed under excitation into the (4)F(5/2) and (4)F(3/2) states. The low phonon energy of this crystal leads to a significant reduction of the multiphonon relaxation rates which allows most of the excited states to relax radiatively. To investigate the nature of the upconversion processes, emission spectroscopy and lifetime measurements for the visible fluorescence, performed by using one photon excitation, have been compared to the upconverted emissions and lifetimes obtained under infrared pulsed excitation. The analysis of the experimental results indicates that the upconverted emissions occur via energy-transfer upconversion.