Znse—ZnS应变超晶格的吸收光谱及子能带的计算

我们首次观测到ZnSe—ZnS应变超晶格的n=1,n=2两个子能带的重、轻空穴激子的吸收光谱。根据LCAO理论、应变感应能带结构理论与Kronig-Penney模型,首次计算了ZnSe—ZnS应变超晶格势阱中重、轻空穴子能带。计算结果由实验所测量的吸收光谱所验证。文中指出,这一计算方法同样适用于其它半导体超晶格。

ABSORPTION SPECTRA AND SUBBAND LEVELS CALCULATION OF ZnSe-SnS STRAINED-LAYER SUPERLATTICES

ZnSe-ZnS strained-layer supcrlattices were thought to be an important blue optoelectronic material. The SLS has been developed quickly so far. But the optical absorption spectra in ZnSe-ZnS SLS were very difficult to observe, because of the use of GaAs substrate which cannot transmit photons above 1.5eV. Y.Kawakami et al. have observed the n=1 subband heavy, light hole''s excitons in the absorption spectra of ZnSe-ZnS SLS on Al2O3 at 4.2K.