ACOUSTICAL ACTIVITY AND RELATED PHENOMENA IN CRYSTALS.
Abstract
Rotatory polarization of transverse acoustic waves is considered. It is demonstrated phenomenologically that, due to spatial dispersion, such 'acoustical activity' should be observable in optically active crystal classes, its magnitude being obtainable from phonon dispersion curves. An estimate of the acoustical activity of tellurium is so obtained. An attempt to measure the acoustical activity of tellurium is described. Alignment requirements are shown to be too critical to detect activity in such trigonal crystals. The effect of conical refraction on the observation of acoustical activity is considered. A similar formalism is applied to an improved study of optical internal conical refraction. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0652935
Entities
People
- David Lawrence Portigal
Organizations
- University of Pennsylvania