Accession Number : ADD010152

Title :   Acoustic Diffractometer.

Descriptive Note : Patent Application,


Personal Author(s) : Iafrate,Gerald J ; Ballato,Arthur

Report Date : 30 Mar 1983

Pagination or Media Count : 15

Abstract : In a preferred embodiment, the invention comprises an acoustic diffractometer in which acoustic waves (phonons) are diffracted through a piezoelectric superlattice, analogous to a diffraction grating, over an arbitrarily wide frequency range, including the desired 100-300 GHz range. Advantageously, the piezoelectric superlattice is formed from a high-resistivity, semi-conducting crystalline material, for example, materials in the cubic class 43 m. This class includes most of the II-VI and III-V compounds, such as GaAs and GaAlAs. The foregoing and other objects and advantages of the invention will appear from the following description. In the description reference is made to the accompanying drawings which form a part hereof, and in which there is shown by way of illustration and not of limitation a preferred embodiment. Such description does not represent the full scope of the invention, but rather the invention may be employed in different arrangements as will be appreciated by those skilled in the art. (Author)

Descriptors :   *Patent applications, *Diffractometers, *Semiconductors, *Piezoelectric materials, *Acoustic waves, Crystal lattices, Group III compounds, Range(Extremes), Group V compounds, Broadband, Phonons, Crystals, Frequency, Inventions

Subject Categories : Acoustics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE