Accession Number : ADP008273

Title :   Hole Burning in the Vibrational Spectrum of Crystals and Glasses,

Corporate Author : CORNELL UNIV ITHACA NY LAB OF ATOMIC AND SOLID STATE PHYSICS

Personal Author(s) : Sievers, A. J.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Persistent IR spectral holes can be generated in the vibrational degrees of freedom of small molecules matrix isolated in crystals and glasses even though no electronic excitation is involved, i.e., a non-photochemical process. The union of the IR lead salt diode laser and broad band FT interferometric methods has produced a new high resolution spectroscopic technique for investigating both the statics and dynamics of molecules in solids. These low power single mode diode lasers (approx. 10 to 100 microwatts) provide a near ideal cw source for investigating persistent IR spectral holes (PIRSHs). They can be produced and probed with a single laser, focused to an intensity at the sample typically up to 100 mW/cm 2. Persistent spectral changes which occur far from the laser line can be monitored with an FTS probe beam at 60 MHz resolution.

Descriptors :   *CRYSTALS, *VIBRATION, *SPECTRA, *GLASS, DEGREES OF FREEDOM, DIODES, DYNAMICS, ELECTRONICS, EXCITATION, HIGH RESOLUTION, INTENSITY, LASERS, LOW POWER, MOLECULES, POWER, PROBES, RESOLUTION, SALTS, SOLIDS, STATICS, INFRARED SPECTRA, LEAD(METAL), BROADBAND, INTERFEROMETERS, FOURIER TRANSFORMATION, SPECTROSCOPY, CONTINUOUS WAVES, GROUND STATE, RELAXATION, ABSORPTION, FREQUENCY, TRANSITIONS, SOLID STATE PHYSICS, MOLECULAR SPECTROSCOPY.

Subject Categories : Solid State Physics
      Atomic and Molecular Physics and Spectroscopy
      Inorganic Chemistry
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE