Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653210 | Solid State Communications | 2005 | 4 Pages |
Abstract
Infrared-to-visible upconversion fluorescence property of Er3+/Yb3+-codoped novel bismuth-germanium glass under 975Â nm LD excitation has been studied. Intense green and red emissions centered at 525, 546 and 657Â nm, corresponding to the transitions 2H11/2â4I15/2, 4S3/2â4I15/2, and 4F9/2â4I15/2, respectively, were observed at room temperature. The quadratic dependence of the 525, 546 and 657Â nm emissions on excitation power indicates that a two-photon absorption process occurs. The structure of the bismuth-germanium glass has been investigated by peak-deconvolution of FT-Raman spectrum, and the structural information was obtained from the peak wavenumbers. This novel bismuth-germanium glass with low maximum phonon energy (â¼750Â cmâ1) can be used as potential host material for upconversion lasers.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Hongtao Sun, Liyan Zhang, Junjie Zhang, Lei Wen, Chunlei Yu, Shixun Dai, Lili Hu, Zhonghong Jiang,