Photoluminescence enhancement in Yb(3+):Er(3+)co-doped eutectic Al(2)O(3): SiO(2) thin films by 980nm excitation.
Si nanocrystals (nc-Si) are addressed in the eutectic Al(2)O(3):SiO(2) thin films co-doped with Er(3+) and Yb(3+) by the laser-induced crystallization (LIC). The thin films are originally synthesized on a silica-on-silicon (SOS) substrate by the microwave electron cyclotron resonance (MW-ECR) plasma source enhanced RF sputtering. Raman spectroscopy has revealed that the strong crystallization occurs with the emergence of the nc-Si in the eutectic Al(2)O(3): SiO(2) layer during the liquid phase transformation. The dual wavelength energy transfer mechanism at 800nm and 980nm induced by 980nm excitation in nc-Si and Yb sensitized Er doped system has been proposed and demonstrated. A tenfold photoluminescence enhancement has been obtained from this mechanism.
Song
Qi
Q
Gao
Jingsong
J
Wang
Xiaoyi
X
Chen
Hong
H
Wang
Tongtong
T
Zheng
Xuanming
X
Li
Cheng-Ren
CR
Song
Chang-Lie
CL