太赫兹QCL的电子结构计算和设计  

Calculation and design of electronic structures for terahertz Quantum Cascade Lasers

作　　者：段素青[1] 楚卫东[1] 张伟[1] 杨宁[1] 

机构地区：[1]北京应用物理与计算数学研究所,北京100088

出　　处：《信息与电子工程》2011年第3期336-341,357,共7页information and electronic engineering

摘　　要：通过电子结构和波函数的设计实现电子选择性注入及粒子数反转是制备太赫兹量子级联激光器(QCL)的基础。本文介绍了求解外场下超晶格QCL电子结构的分区级数解法及非正交基对角化方法,并将计算结果与国际上啁啾超晶格及共振声子模式QCL的相关实验结果进行了对比,二者的精确吻合证明了计算方法的准确性。在此基础上给出了一种共振声子模式QCL超晶格的有源区设计方案,并讨论了外场偏离设计值对QCL特性的影响。The theoretical basis of superlattice terahertz Quantum Cascade Lasers（QCL） is to achieve the electron selective injection and the population inversion of the radiative states by energy level structure and wave function design.In this work,the power series method and the non-orthogonal basis diagonalization method were employed to calculate the electronic structures of the superlattice within the electric field,which are in excellent agreement with the experimental results in corresponding references.Then an active region design of resonant-phonon model was presented and the influences of the deviation of external field from the design value were discussed.

关 键 词：太赫兹 量子级联激光器 分区级数解法 

分 类 号：O441.4[理学—电磁学]