Accession Number : ADP008257

Title :   Subnanosecond Time Resolved Study of Accumulated Photon Echoes in Chlorin Doped Polymer Films at 1.2 K,

Corporate Author : EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZURICH (SWITZERLAND)

Personal Author(s) : Gygax, Hansruedi ; Gorlach, Ekkehard ; Rebane, Alexander ; Wild, Urs P.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Organic impurity systems which exhibit effect of photo-burning of persistent spectral holes have several interesting spectroscopic and prospective practical applications. A CW holographic technique for detecting of narrow hole shapes in thin polymer films doped with organic dye molecules can be used in combination with a variable-strength applied electric field to obtain information about the homogeneous line shapes and symmetry properties of the impurity centres. This method serves also as a demonstration of the possibility of parallel optical computing. An alternative approach to measure homogeneous line shape properties of low temperature impurity systems consists in the application of coherent optical transient techniques such as photon echoes and accumulated photon echoes. A variation of an accumulated photon echo technique in photo-chemical hole burning media - photo-chemically accumulated stimulated photon echo (PASPE) has been shown to be useful in measuring homogeneous dephasing times as well as in writing ultrafast time domain holograms. In the present work we describe an experiment where we have combined the principles of PASPE and time- and space domain holography with a sensitive subnanosecond time resolution detection using time-correlated single photon counting (TCSPC) apparatus. We also discuss the relation between the present time domain experiment and CW holographic hole burning.

Descriptors :   *HOLOGRAPHY, DETECTION, DYES, ECHOES, ELECTRIC FIELDS, FILMS, HOLOGRAMS, IMPURITIES, LOW TEMPERATURE, MEDIA, MOLECULES, PHOTONS, POLYMERS, RESOLUTION, SHAPE, SYMMETRY, TEMPERATURE, TIME, TIME DOMAIN, TRANSIENTS, VARIABLES, VARIATIONS, DOPING, COHERENT OPTICAL RADIATION, LASER BEAMS, HOLOGRAPHY, MOLECULAR SPECTROSCOPY.

Subject Categories : Atomic and Molecular Physics and Spectroscopy
      Holography

Distribution Statement : APPROVED FOR PUBLIC RELEASE