Search for Far Infrared Radiation from Optically Pumped Defect Modes
Abstract
Five different experimental studies are described. (1) Hole burning in chalcogenide glasses: The Quantitative form of the hole relaxation depends solely on the average coordination number of the glass independent of chemical composition. (2) PIRSH Burning of Tb(3+) in Alkaline Earth Fluoride Crystals: These PIRSHs in 'glassy' crystals display the characteristics properties of spectral holes burned in true glasses. (3) NO2(-) Ions in Alkali Halides: Four different kinds of vibrational hole burning have been carried out: (1) the hole and antihole in the same absorption line, (2) the antihole removed in frequency from the inhomogeneously broadened line, (3) multiple antiholes and (4) the burning at one vibrational mode frequency while monitoring the persistent changes produced in the other internal (IR) or external (FIR) modes with a high resolution FT interferometer. (4) Calculations and Simulations of Vibrational Solitons in Crystals: The stationary localized mode results for perfect anharmonic crystals are reminiscent of the defect induced local modes studied in the harmonic approximation. (5) KI:Ag(+) Vibrational Dynamics: First Evidence for Vibrational Solitons: The silver ion in KI is the most thermally unstable lattice-defect combination known. It may result from localized anharmonic modes being released into the lattice.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 05, 1993
- Accession Number
- ADA266744
Entities
People
- A. J. Sievers
Organizations
- University of Minnesota