A two-photon pumped polyfluorene laser

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Abstract

A tunable two-photon pumped solid-state laser based on polyfluorene is reported. A detailed investigation of the two-photon absorption in polyfluorene for both nanosecond and femtosecond time regimes in solution, and solid-state allows the determination of the most favorable conditions for lasing. Tunable distributed feedback lasers are made by spin coating from a polyfluorene solution on corrugated silica substrates and lasing is achieved under two-photon excitation at 640 nm with an absorbed energy density at lasing threshold of 1.3 mJ/cm(2). These results highlight an alternative pumping scheme for blue organic semiconductor lasers.

Original languageEnglish
Article number253304
Number of pages3
JournalApplied Physics Letters
Volume94
Issue number25
DOIs
Publication statusPublished - 22 Jun 2009

Keywords

  • distributed feedback lasers
  • high-speed optical techniques
  • laser tuning
  • optical pumping
  • organic semiconductors
  • polymers
  • semiconductor lasers
  • two-photon processes
  • DISTRIBUTED-FEEDBACK
  • CONJUGATED POLYMERS
  • ABSORPTION
  • DIODES

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