Abstract: An acousto-optical component or other high frequency and wide-band ultrasonic component comprises a piezoelectric transducer and a crystalline or glass sound medium which are bonded together by a multi-layer metal molecular adhesion bond. During fabrication, the surfaces of the piezoelectric body and the sound medium which are to be connected are first polished to a degree of smoothness which is well below that of a Newton ring. These surfaces are then completely cleansed and a first metal layer having a thickness of 0.5-2 nm is vapor deposited onto each the cleansed surfaces. Next, a second metal layer having a thickness of 5-20 nm is vapor deposited onto each of the first layers. The transducer is then applied, by molecular adhesion, to the sound medium. To form a strong and reliable bond, only moderate pressures of about 250 to 1500 psi are necessary. A metal layer having a thickness of 0.3-0.6 .mu.

Abstract: A wave-guide structure for use in optical communications and a method of producing the wave-guide structure characterized by a substrate of a given index of refraction, a wave-guide layer having lateral edges and a different index of refraction disposed on a surface of the substrate and a multi-layer system extending through the wave-guide layer between the lateral edges to separate the wave-guide layer into two wave-guide portions which are integral with the multi-layer system and in planar alignment with each other, the multi-layer system comprises a plurality of layers with different indexes of refraction which layers extend at either a right angle or oblique angle to the surface of the wave-guide layer and at either a right angle or an oblique angle to the lateral edges so that radiation transmitted in one of the wave-guide portions has an angle of incident with the multi-layer system. The multi-layer system may extend partially ito the substrate or completely therethrough.