SPECTROSCOPY OF POINT DEFECTS,
Abstract
The absorption spectra of such impurities as oxygen, carbon, and nitrogen are being studied in the lattice of silicon and molecular vibrations are obtained at 9 microns, 12.2 microns, and 10.6 microns, respectively. High density defects, created by irradiation with fast neutrons, polarize the lattice and make it possible to observe the direct photon-phonon interaction. The infrared absorption spectra due to single phonons are composed of bands at 488, 417, and 331, as well as at 140/cm, corresponding to modes TO, LO, LA, and TA, respectively. The energies of TO, for example, are determined under high resolution at the point of maximum density of modes at Gamma, L., W, and X. They are 516.5 = 1, 488.5 = 1, 474 = 1, and 447 = 1. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 1963
- Accession Number
- AD0611194
Entities
People
- E. Da Silva
- M. Balkanski
- Witold Nazarewicz
Organizations
- École Normale Supérieure