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GaN基激光器的特性
Authors
张书明
张立群
+4 more
朱建军
杨辉
江德生
赵德刚
Publication date
1 January 2009
Publisher
Abstract
GaN基激光器具有广泛的应用.如何获得平整腔面是蓝宝石衬底上制作GaN激光器的困难之一.通过对解理面的分析和不同衬底厚度时腔面形貌的比较,发现减薄衬底可以有效降低腔面粗糙度.当外延片厚度减薄至50μm时,获得近似镜面的腔面.激光器的测量证实了腔面的改善可以降低阈值电流,增加斜率效率.利用二维光波导模型计算了脊形高度对限制因子和远场分布的影响.计算结果说明,增加脊形高度可以增加限制因子,降低远场纵横比.通过测量具有不同脊形高度的器件,证实了脊形高度增加,阈值电流降低、远场纵横比减小
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Last time updated on 15/03/2019