Dye-triplet-state and singlet-oxygen quenching effects in solid state dye lasers

Terence A. King, Mohammad Ahmad, A. A. Gorman, I. Hamblett, Mark D. Rahn

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

The main photodegradation mechanisms of pyrromethene 567 are discussed, and the quantum efficiency of self-sensitized photo-oxidation, the predominant mechanism, was found to be 0.5% in aerated benzene-d6. Other degradation mechanisms do exist, but the high photostability of the dye in solid host media possibly implies that they are all diffusion controlled. Solid-state dye lasers based on pyrromethene 567 doped poly(methyl methacrylate) with an added singlet oxygen quencher 1,4-diazobicyclo [2,2,2] octane (DABCO) showed a lifetime of 550,000 pulses. A triplet quencher, perylene, provided no improvement. Singlet oxygen quenching is effective in the solid-state whereas triplet quenching is not, presumably due to the slower diffusion rate of dye molecules compared with oxygen.

Original languageEnglish
Pages (from-to)145-153
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3929
Publication statusPublished - Jan 1 2000
EventSolid State Lasers IX - San Jose, CA, USA
Duration: Jan 25 2000Jan 26 2000

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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