STRAINED-LAYER SUPERLATTICES.

High-quality superlattices are grown from semiconductor materials with lattice mismatches of several percent for sufficiently thin layers. These strained-layer superlattices provide previously unexploited freedom in the choice of materials and the ability to tailor the electrical and optical properties. Such artificially structured materials open up entirely new areas of materials science and permit the development of novel devices with new or improved characteristics. After a brief review of the history of SLS's recent results in these areas along with devices based on the unique properties of these structures are illustrated.