Chin. J. Semicond. > Volume 13 > Issue 7 > Article Number: 405

光伏法测量AlAs/GaAs超晶格子带间光跃迁

朱文章 , 陈朝 , 刘士毅 , 江德生 and 庄蔚华

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Abstract: 采用电容耦合法,在18—300K温度范围内测量了AlAs/GaAs超晶格的光伏谱.在100K以下,光伏曲线反映了台阶式二维状态密度分布,可观测到6个信号峰.采用Kronig-Penney模型计算势阱中导带和价带子带的位置和带宽,共有3个导带子带,6个重空穴子带和3个轻空穴子带.根据宇称守恒确定光跃迁选择定则,对6个峰进行指认.实验结果与理论计算的结果基本相符合.

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History

Manuscript received: 19 August 2015 Manuscript revised: Online: Published: 01 July 1992

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