Accession Number : AD0756615

Title :   On Diffraction and Focusing in Anisotropic Crystals,

Corporate Author : MCGILL UNIV MONTREAL (QUEBEC) DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Kharusi,Muhammed S. ; Farnell,Gerald W.

Report Date : 18 MAY 1972

Pagination or Media Count : 12

Abstract : The paper discusses various aspects of diffraction and focusing for waves in anisotropic crystals, and the concepts are applicable to electromagnetic, ultrasonic bulk, or ultrasonic surface waves in homogeneous but arbitrarily anisotropic crystals. A numerical technique based on an angular spectrum of plane waves representation is shown to produce theoretical intensity profiles in good agreement with acoustooptic probe measurements of the diffraction field of a slit-type ultrasonic transducer launching quasi-longitudinal and quasi-shear waves in quartz along on axis of extreme anisotropy where the wave normal and the direction of energy flow are separated by angles greater than 20 degrees. (Author Modified Abstract)

Descriptors :   (*PIEZOELECTRIC CRYSTALS, *ULTRASONIC RADIATION), ANISOTROPY, DIFFRACTION, FOCUSING, CANADA, LITHIUM COMPOUNDS, NIOBATES, QUARTZ

Subject Categories : Line, Surface and Bulk Acoustic Wave Devices
      Acoustooptic and Optoacoustic Devices
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE