Modeling of resistance characteristics of a continuously-graded distributed Bragg reflector in a 980

• 作 者: 黄梦 吴坚 崔怀洋 钱建强 宁永强
• 机 构: Department of Applied Physics,Beihang University and Key Laboratory of Micro-Nano Measurement-Manipu
• 出 处: Chinese Physics B
• 发表日期: 2012年10期
• 关键词: graded reflector Bragg junction mirrors VCSEL continuously mirror optimize model

The resistance characteristics of a continuously-graded distributed Bragg reflector(DBR) in a 980-nm verticalcavity surface-emitting laser(VCSEL) are modeled in detail.The junction resistances between the layers of both the p-and n-DBR mirrors are analysed by combining the thermionic emission model and the finite difference method.In the meantime,the intrinsic resistance of the DBR material system is calculated to make a comparison with the junction resistance.The minimal values of series resistances of the graded p-and n-type DBR mirrors and the lateral temperature-dependent resistance variation are calculated and discussed.The result indicates the potential to optimize the design of the DBR reflectors of the 980-nm VCSELs.

The resistance characteristics of a continuously-graded distributed Bragg reflector (DBR) in a 980-nm verticalcavity surface-emitting laser (VCSEL) are modeled in detail. The junction resistances between the layers of both the p-and n-DBR mirrors are analysed by combining the thermionic emission model and the finite difference method. the meantime, the intrinsic resistance of the DBR material system is calculated to make a comparison with the junction resistance. The minimal values ​​of series resistances of the graded p-and n-type DBR mirrors and the lateral temperature-dependent resistance variations are calculated and discussed. The results shows the potential to optimize the design of the DBR reflectors of the 980-nm VCSELs.