Characteristics of conduction minibands of Si/Si1-xGex superlattices

A study of the conduction band characteristics of Si/Si(1-x)Ge(x) superlattices revealed that the most prominent feature of such double well-and-barrier superlattices was the merging of two adjacent state minibands that had islands in the center. Far infrared range photodetection uses optical transitions that occur across the miniband islands.