Photo-tautomer of Br-porphyrin: a new frequency-selective material for ultrafast time-space holographic storage

Drobizhev, M.; Sigel, C.; Rebane, A. (2000). Photo-tautomer of Br-porphyrin: a new frequency-selective material for ultrafast time-space holographic storage. Journal of Luminescence, 86, 391−397.
ajakirjaartikkel
Drobizhev, M.; Sigel, C.; Rebane, A.
  • Inglise
J. Lumines.
Journal of Luminescence
1872-7883; 0022-2313
86
2000
391397
Ilmunud
1.1. Teadusartiklid, mis on kajastatud Web of Science andmebaasides Science Citation Index Expanded, Social Sciences Citation Index, Arts & Humanities Citation Index ja/või andmebaasis Scopus (v.a. kogumikud)
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English, We study spectral hole burning in the unstable tautomer form of free-base Br-tetraethylporphyrin in poly(vinyl butyral) film, which is created by photo-transformation of the stable tautomer form at low temperature. We report a Debye-Waller factor alpha = 0.7 at 4 K, burning quantum efficiency phi similar to 10(-3) and thermal stability up to 115 K for this system. We observe for the first time that narrow-band illumination in the educt band leads to the formation of vibronic holes in the photoproduct band. Because the oscillator strength of the unstable form is at least one order of magnitude larger than that of the stable form, this new material is well suited for recording ultrafast time-and-space-domain holograms. Spectral hole burning with femtosecond pulses was achieved. (C) 2000 Elsevier Science B.V. All rights reserved.
non-symmetric porphyrin; hole burning; ultrafast time-space holography;