多层超晶格结构的能级分裂

本文对多层超晶格结构的能级分裂作了理论分析,导出了能级分裂的简明表式.结果表明:对应于单量子阱的每一能级,构成多重阱时,将发生分裂.能级的分裂值与该能级值有关,同时也是构成超晶格的材料参数和几何结构的函数.把本文的理论结果应用于GaAs-Al_xGa_1-xAs超晶格结构的能级分裂计算,所得的数值与实验^1]比较,基本符合.

THE ENERGY-LEVEL SPLITTINGS OF A MULTI-LAYER SUPERLATTICE

In this article, the energy-level splittings of a multi-layer supperlattioe are analysed theoretically and a simple expression about the splittings has thus been derived. It is clear to see that the energy-level of a single well splits into a number of levels as a result of the coupling of the wells, the number of the splittings being just the same as expected as that of wells. The splittings of a certain energy level are not only related to the energy level but also relevant to the material parameter and structure parameter of the super lattice. The result has been applied to a GaAs-Alx Ga (1-x) As superlattice, and the calculation about its energy-level splittings yields data in pretty good agreement with experimental values.