Non-linear luminescence of dimethylaminobenzylidene-I,3-indandione solids

G. Kodis, V. Gulbinas, L. Valkunas, S. Jurše̊nas

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

The origin of the non-linear anti-Stokes luminescence effect in dimethylaminobenzylidene-1,3-indandione (DMABI) crystals, i.e. the luminescence in the visible spectral region created by infrared excitation, was investigated by means of ultrafast pump-probe and luminescence spectroscopy. In contrast with the previously proposed luminescence excitation model based on low-energy exciton annihilation, the luminescence state was found to be excited via two-photon absorption through virtual and real (characterised by 1 ps lifetime) intermediate states. Second-harmonic generation and pulse duration effects on the non-linear luminescence are discussed. Exciton-exciton annihilation on the manifold of luminescent states was observed at high excitation intensities.

Original languageEnglish (US)
Pages (from-to)391-394
Number of pages4
JournalAdvanced Materials for Optics and Electronics
Volume6
Issue number5
DOIs
StatePublished - 1996
Externally publishedYes

Keywords

  • Dimethylaminobenzylidene-1,3-indandione
  • Exciton-exciton annihilation
  • Non-linear luminescence
  • Pump-probe and luminescence spectroscopy
  • Solids

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemical Engineering(all)

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