Stimulated emission in dendrimer-doped polymer waveguides

Akira Otomo, Sonoko Otomo, Shiyoshi Yokoyama, Shinro Mashiko

Research output: Contribution to journalConference article

6 Citations (Scopus)

Abstract

Stimulated emission was studied in dendrimer-doped polymer waveguides. A supernarrowing laser spectrum was observed without using any resonator mirrors, due to the moderate scattering caused by densely doped dendrimer aggregates in a polymer waveguide. At the optimum operation level, the spectral linewidth was found to be 0.55 nm, which was limited by the resolution of the spectrograph used. Weak scattering from the aggregated dendrimers in the host polymer matrix with gain was responsible for the photon localization. However, in contrast to conventional random lasers with strong scattering, weak scattering enables the long amplification path through the waveguide producing a directional beam and a supernarrowing spectrum. The dependence of supernarrowing lasing behavior on the density of the scattering moiety was studied by changing the dendrimer doping ratios in the polymer matrix.

Original languageEnglish
Pages (from-to)278-283
Number of pages6
JournalThin Solid Films
Volume393
Issue number1-2
DOIs
Publication statusPublished - Aug 1 2001
Externally publishedYes
Event4th International Conference on Nano-Molecular Electronics - Kobe, Japan
Duration: Dec 5 2000Dec 7 2000

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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