Open AccessEfficient three-photon luminescence with strong polarization dependence from a scintillating silicate glass co-doped with Gd^3+ and Tb^3+
Author(s) -
Guang-Can Li,
Chenyun Zhang,
Haixiao Deng,
Guangyin Liu,
Sheng Lan,
Qi Qian,
Zhongmin Yang,
Venu Gopal Achanta
Publication year - 2013
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.21.006020
Subject(s) - femtosecond , materials science , luminescence , doping , polarization (electrochemistry) , photon , terbium , photon energy , silicate , laser , optics , atomic physics , optoelectronics , chemistry , physics , organic chemistry
Efficient three-photon luminescence (3PL) from a scintillating silicate glass co-doped with Gd(3+) and Tb(3+) was generated by using a focused femtosecond laser beam at 800 nm. Four emission bands centered at 496, 541, 583, and 620 nm were identified as the electronic transitions between the energy levels of Tb(3+) followed by three-photon absorption (3PA) in Gd(3+) and Tb(3+) and the resonant energy transfer from Gd(3+) to Tb(3+). More interestingly, a strong polarization dependence of the 3PL was observed and it is ascribed to the polarization dependent 3PA in Gd(3+) and Tb(3+) and/or the angular distribution of photogenerated electrons in the glass.