標題: | Size dependence of exciton-phonon coupling in sol-gel ZnMgO powders |
作者: | Chia, C. H. Chen, J. N. Han, T. C. Chiou, J. W. Lin, Y. C. Hsu, W. L. Chou, W. C. 電子物理學系 Department of Electrophysics |
公開日期: | 15-三月-2011 |
摘要: | We found that the exciton-phonon coupling in the Zn(1-x)Mg(x)O powders (0.01 <= x <= 0.07) is greatly influenced by the crystalline-size. Two well-resolved photoluminescence (PL) bands due to recombination of free exciton and its longitudinal optical (LO)-phonon replicas enable us to analyze the relative intensities among free excitons, one-LO-phonon replicas, and two-LO-phonon replicas. As crystalline size increases, a larger enhancement of the PL-intensity ratio of a free exciton to its LO-phonon replicas was found compared to that of two LO-phonon replica to one-LO-phonon replica. (C) 2011 American Institute of Physics. [doi:10.1063/1.3563574] |
URI: | http://dx.doi.org/10.1063/1.3563574 http://hdl.handle.net/11536/9140 |
ISSN: | 0021-8979 |
DOI: | 10.1063/1.3563574 |
期刊: | JOURNAL OF APPLIED PHYSICS |
Volume: | 109 |
Issue: | 6 |
結束頁: | |
顯示於類別: | 期刊論文 |