磁场下超晶格的子带结构及光跃迁

用有效质量方法计算了磁场下超晶格的子带结构和光跃迁。详细地介绍了计算方法,计算了磁能级的能量随磁场和阱宽的变化。发现随磁场和阱宽的增加,轻空穴态的混入就越显著,只有最低的三个重空穴态还基本保持原来的特性。计算中还发现第三轻空穴带对得到收敛的解是必不可少的。最后讨论了磁光跃迁几率和迴旋共振的有效质量。关键词：

HOLE SUBBANDS AND OPTICAL TRANSITIONS OF SUPERLA- TTICES IN MAGNETIC FIELD

Hole subbands and optical transitions of superlattices in magnetic field are calculated on the basis of the Luttinger-Kohn effective mass theory. The method of calculation is described in detail, and the dependences of Landau energy levels on magnetic fields and well widths are presented. It is found that when magnetic field or well width increases the intermixing of heavy and light holes becomes obvious, only the three lowest states still keep their original characters of heavy holes. It is also found that the third light hole subband is necessary for the convergence of solutions. The magnetic-optical transition probabilities and the effective masses of cyclotron resonance are discussed.