Accession Number : ADA263708


Title :   Femtosecond Laser Studies of Excited State Dynamics


Descriptive Note : Final rept. 1 Jun 1990-31 Mar 1993


Corporate Author : IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY


Personal Author(s) : Sorokin, Peter P ; Glownia, J H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a263708.pdf


Report Date : Mar 1993


Pagination or Media Count : 15


Abstract : Considerable progress has been made in the two main (and interrelated) areas in which the recent research has been focussed. These are (a) the development of novel, intense, femtosecond-time-scale, VUV laser sources, and (b) the development of femtosecond-time-scale, transition-state absorption spectroscopy of photodissociating gas-phase molecules. In both of these areas, some trails have been blazed that will undoubtedly soon be followed by others. A third area of investigation was to examine the possibility of two- photon amplification in the molecular system diphenyl hexatriene (DPH). Here the critical experiment still remains to be done. However, researchers were able to show that DPH does satisfy one stringent requirement for a potential two-photon amplifying system, namely, that it be completely stable against one-photon lasing under conditions of very heavy optical pumping..... Femtosecond-Time- Scale, Gas phase molecules, Photons, Lasers, Diphenyl hexatriene, Optical pumping.


Descriptors :   *EXCITATION , *LASERS , ABSORPTION , AMPLIFICATION , DYNAMICS , FOUR WAVE MIXING , GASES , MOLECULAR STATES , MOLECULES , OPTICAL PUMPING , PHASE , PHENYL RADICALS , PHOTONS , PULSES , REQUIREMENTS , SCALE , SPECTROSCOPY , TIME , TRANSITIONS , XENON


Subject Categories : Organic Chemistry
      Physical Chemistry
      Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE