Amplified spontaneous emission from the film of poly(aryl ether) dendrimer encapsulating excited-state intramolecular proton transfer dye

Sehoon Kim, Soo Young Park, Iori Yoshida, Hideki Kawai, Toshihiko Nagamura

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61 Citations (Scopus)


Nonresonant exponential amplification of the excited-state intramolecular proton transfer (ESIPT) emission has been investigated with the film of ESIPT dendrimer (QG2) by pico- and femtosecond laser experiments. The intrinsic four-level nature of ESIPT and the reduced concentration quenching by dendritic effect made QG2 film an optical gain medium with the threshold intensity lower than 20 μJ/cm2/pulse. The characteristics of emission amplification are discussed in terms of the amplified spontaneous emission (ASE) related with ESIPT.

Original languageEnglish
Pages (from-to)9291-9294
Number of pages4
JournalJournal of Physical Chemistry B
Issue number36
Publication statusPublished - 2002 Sep 12
Externally publishedYes


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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