Enhancement of ultraviolet lasing from Ag-coated highly disordered ZnO films by surface-plasmon resonance
Enhancement of ultraviolet lasing from Ag-coated highly disordered ZnO films by surface-plasmon resonance
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DOI：
10.1063/1.2746940
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发表时间：
2007-06-04
影响因子：
4
通讯作者：
Yang, H. Y.
中科院分区：
文献类型：
--
作者：
Abiyasa, A. P.;Yu, S. F.;Yang, H. Y.
镀银的高度无序的氧化锌薄膜在紫外光波段的随机激光作用得到了很大的改善。激光阈值降低两倍，斜率效率提高5.5倍。这种改善是由于银涂层的存在，它通过表面等离子体共振增强了氧化锌薄膜激光发射的表面耦合，并降低了随机腔模式所经历的散射损失。此外，激光效率的提高依赖于银涂层的表面粗糙度，这可以通过氧化锌薄膜的表面形貌来控制。(C)2007年美国物理研究所。
Large improvement in random lasing action at ultraviolet wavelength has been achieved from highly disordered ZnO films with Ag coating. The lasing threshold can be reduced by two times and slope efficiency can be increased by 5.5 times. The improvement is due to the presence of Ag coating, which enhances the surface coupling of lasing emission from the ZnO films by surface-plasmon resonance and reduces the scattering loss experienced by the random cavity modes. Furthermore, the enhancement of lasing efficiency is dependent on the Ag coating's surface roughness, which can be controlled through the surface morphology of ZnO films. (c) 2007 American Institute of Physics.