计算 Ga As/Alx Ga1 - x As系列超晶格材料能带及带间光吸收谱 .结果 发现当 Ga As/Al0 .3Ga0 .7As的周期层厚为 1 8nm
Ga As层厚为 3nm时
在 1 0 .6μm处有一强的红外吸收峰 .结论 这类材料可被作为特定波段的红外吸波材料
Abstract
Aim\ To study the infrared absorption properties of GaAs/Al\-\%x\%Ga\-\{1-\%x\%\}As superlattice
especially at 10.6 μm. Methods\ Calculating the energy band structure and infrared absorption coefficients within the frame work of effective mass. Results\ There exists a strong infrared absorption at 10.6 μm in GaAs/Al\-\{0.3\}Ga\-\{0.7\}As superlattice when the width of potential barrier is 3 nm and the period is 18 nm. Conclusion\ This kind of superlattices can be well used as infrared absorption materials.