title: Photoluminescence enhancement in Yb(3+):Er(3+)co-doped eutectic Al(2)O(3): SiO(2) thin films by 980nm excitation.
abstract: 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.
authors.forename: Qi
authors.initials: Q
authors.lastname: Song
authors.forename: Jingsong
authors.initials: J
authors.lastname: Gao
authors.forename: Xiaoyi
authors.initials: X
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Tongtong
authors.initials: T
authors.lastname: Wang
authors.forename: Xuanming
authors.initials: X
authors.lastname: Zheng
authors.forename: Cheng-Ren
authors.initials: CR
authors.lastname: Li
authors.forename: Chang-Lie
authors.initials: CL
authors.lastname: Song