SINGLE-CHIP FUSED HYBRIDS FOR ACOUSTOELECTRIC AND ACOUSTOOPTIC APPLICATIONS

The combination of the electronic and optical properties of a semicond uctor hetero-junction and the acoustic properties of a piezoelectric s ubstrate material yields a new class of very promising hybrids for pot ential acousto-electric and acousto-optic applications. LiNbO3/GaAs hy brids have been fabricated using the epitaxial lift-off technique resu lting in unusually large acousto-electric and acousto-optic interactio n between the quasi two-dimensional electron system in the semiconduct or and surface acoustic waves on the piezoelectric substrate. Field ef fect tunability of the interaction at room temperature is demonstrated and possible device applications are discussed. Photoluminescence mea surements show the influence of the acousto-electric fields on the opt ical properties of quantum well structures. (C) 1997 American Institut e of Physics.