Directionally enhanced photoluminescence from distributed feedback cavity polaritons

Tohru Fujita, Teruya Ishihara

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


We observed the directional enhancement of photoluminescence (PL) for nonresonant excitation from cavity polaritons in the distributed feedback (DFB) waveguide microcavities when a cavity standing wave mode is resonant to an exciton. The cavities consist of a quartz grating substrate with ∼700 nm pitch, a (C6H5C2H4NH3) 2PbI4 film with large exciton oscillator strength, and a polystyrene film. They are regarded as a new type of one-dimensional photonic crystals consisting of resonant dispersive materials which couple strongly to modes in the crystals. On the other hand, a dye-dispersed film on the grating does not exhibit such an enhancement, which demonstrates that the polariton effect is essential. We point out for periodic structures in the strong coupling regime that a macroscopic polarization formed under a resonant condition may-exhibit ultrafast radiative decay.

Original languageEnglish
Pages (from-to)2918-2921
Number of pages4
Journaljournal of the physical society of japan
Issue number9
Publication statusPublished - 1999 Sep
Externally publishedYes


  • Band-edge effect
  • Cavity polariton
  • Distributed feedback microcavity
  • Macroscopic polarization
  • Photonic crystal
  • Waveguide

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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